802.589.0911 Live Chat With Us

Finish Selecting Your Vehicle to Shop For Your PCV Valve

Choose a Year for your Mercury 's PCV Valve

  • 2011
  • 2010
  • 2009
  • 2008
  • 2007
  • 2006
  • 2005
  • 2004
  • 2003
  • 2002
  • 2001
  • 2000
  • 1999
  • 1998
  • 1997
  • 1996
  • 1995
  • 1994
  • 1993
  • 1992
  • 1991
  • 1990
  • 1989
  • 1988
  • 1987
  • 1986
  • 1985
  • 1981
  • 1980
  • 1979
  • 1978
  • 1976
  • 1975
  • 1974
  • 1972
  • 1970
  • 1967
  • 1963
Show More Years

Shop By Brand

The Following brands are available based on your search.

  • Beck Arnley
    Beck Arnley
  • Forecast
    Forecast
  • Genuine
    Genuine
  • Motorcraft
    Motorcraft
  • Standard Ignition
    Standard Ignition

Best Selling Genuine Mercury PCV valves

  • We Stock the following top leading brands, including Motorcraft, Standard Ignition
  • Constantly Updated Inventory of Mercury Replacement PCV Valve Parts

We stock PCV Valve parts for most Mercury models, including Cougar, Grand Marquis, Mountaineer, Sable, Villager.

Motorcraft
1986 Mercury Grand Marquis PCV Valve 8 Cyl 5.0L Motorcraft

P311-27F5B70    W0133-1699149  New

Qty:
$18.15
Motorcraft PCV Valve
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
Brand: Motorcraft
Additional Fitment Information:
Vehicle Submodel Block Engine CID CC
1986 - Mercury Grand Marquis LS V 8 Cyl 5.0L 302 -
Motorcraft
1998 Mercury Mountaineer PCV Valve 6 Cyl 4.0L Motorcraft

P311-4082E85    W0133-1702526  New

Qty:
$14.39
Motorcraft PCV Valve
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
Brand: Motorcraft
Additional Fitment Information:
Vehicle Block Engine CID CC
1998 - Mercury Mountaineer V 6 Cyl 4.0L 245 -
Motorcraft
2000 Mercury Mystique PCV Valve 6 Cyl 2.5L Motorcraft

P311-4C2331E    W0133-1699556  New

Qty:
$30.51
Motorcraft PCV Valve
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
Brand: Motorcraft
Additional Fitment Information:
Vehicle Block Engine CID CC
2000 - Mercury Mystique V 6 Cyl 2.5L 155 2450
Motorcraft
1995 Mercury Mystique PCV Valve 6 Cyl 2.5L Motorcraft

P311-4C2331E    W0133-1699556  New

Qty:
$30.51
Motorcraft PCV Valve
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • From 08/01/95Vendor:MOTORCRAFTVendor #EV-152-C
Brand: Motorcraft
Additional Fitment Information:
Vehicle Block Engine CID CC
1995 - Mercury Mystique V 6 Cyl 2.5L 155 2450
Motorcraft
1995 Mercury Mystique PCV Valve 6 Cyl 2.5L Motorcraft

P311-4C2331E    W0133-1699556  New

Qty:
$30.51
Motorcraft PCV Valve
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • To 08/01/95Vendor:MOTORCRAFTVendor #EV-152-A
Brand: Motorcraft
Additional Fitment Information:
Vehicle Block Engine CID CC
1995 - Mercury Mystique V 6 Cyl 2.5L 155 2450
Motorcraft
2003 Mercury Sable PCV Valve Motorcraft

P311-0CDAA9A    W0133-1698967  New

Qty:
$16.05
Motorcraft PCV Valve
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
Brand: Motorcraft
Additional Fitment Information:
Vehicle Fuel Type Cylinder Head Type
2003 - Mercury Sable GAS OHV
Motorcraft
1998 Mercury Sable PCV Valve Motorcraft

P311-1B48364    W0133-2036259  New

Qty:
$23.37
Motorcraft PCV Valve
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
Brand: Motorcraft
Additional Fitment Information:
Vehicle Cylinder Head Type
1998 - Mercury Sable DOHC
Motorcraft
2009 Mercury Milan PCV Valve 6 Cyl 3.0L Motorcraft

P311-38111BD    W0133-1772033  New

Qty:
$85.19
Motorcraft PCV Valve
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
Brand: Motorcraft
Additional Fitment Information:
Vehicle Block Engine CID CC
2009 - Mercury Milan V 6 Cyl 3.0L 181 2968
Motorcraft
2002 Mercury Mountaineer PCV Valve 8 Cyl 4.6L Motorcraft

P311-51F6809    W0133-1707461  New

Qty:
$37.61
Motorcraft PCV Valve
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
Brand: Motorcraft
Additional Fitment Information:
Vehicle Block Engine CID CC
2002 - Mercury Mountaineer V 8 Cyl 4.6L 281 -
Motorcraft
2004 Mercury Mountaineer PCV Valve 8 Cyl 4.6L Motorcraft

P311-49688E9    W0133-1766869  New

Qty:
$37.61
Motorcraft PCV Valve
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
Brand: Motorcraft
Additional Fitment Information:
Vehicle Block Engine CID CC
2004 - Mercury Mountaineer V 8 Cyl 4.6L 281 -
Motorcraft
2009 Mercury Milan PCV Valve 4 Cyl 2.3L Motorcraft

P311-0E125AA    W0133-1874775  New

Qty:
$34.20
Motorcraft PCV Valve
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
Brand: Motorcraft
Additional Fitment Information:
Vehicle Block Engine CID CC
2009 - Mercury Milan L 4 Cyl 2.3L 140 -
Motorcraft
2005 Mercury Sable PCV Valve Motorcraft

P311-38111BD    W0133-1772033  New

Qty:
$85.19
Motorcraft PCV Valve
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • with Electrically Heated PCV System
Brand: Motorcraft
Additional Fitment Information:
Vehicle Fuel Type Cylinder Head Type
2005 - Mercury Sable GAS OHV
Motorcraft
2011 Mercury Grand Marquis PCV Valve Motorcraft

P311-5AC7847    W0133-1883978  New

Qty:
$36.84
Motorcraft PCV Valve
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
Brand: Motorcraft
Additional Fitment Information:
Vehicle
2011 - Mercury Grand Marquis
Motorcraft
2011 Mercury Milan PCV Valve 6 Cyl 3.0L Motorcraft

P311-375E083    W0133-1702783  New

Qty:
$86.63
Motorcraft PCV Valve
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
Brand: Motorcraft
Additional Fitment Information:
Vehicle Block Engine CID CC
2011 - Mercury Milan V 6 Cyl 3.0L 181 2968
Motorcraft
2004 Mercury Monterey PCV Valve Motorcraft

P311-375E083    W0133-1702783  New

Qty:
$86.63
Motorcraft PCV Valve
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • w/o Electric Heated PCV Valve
Brand: Motorcraft
Additional Fitment Information:
Vehicle
2004 - Mercury Monterey
Motorcraft
2010 Mercury Mountaineer PCV Valve 6 Cyl 4.0L Motorcraft

P311-375E083    W0133-1702783  New

Qty:
$86.63
Motorcraft PCV Valve
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • with Harness
Brand: Motorcraft
Additional Fitment Information:
Vehicle Block Engine CID CC
2010 - Mercury Mountaineer V 6 Cyl 4.0L 245 -
Standard Ignition
1975 Mercury Capri PCV Valve 6 Cyl 2.8L Standard Ignition

P311-1261674    V173  New

8-06487-532-0 , FV178 , 19303069 , PV758 , 6487532 , PCV57 , FV178DP , 28127 , PCV74 , PC74 , 3-769 , 6P1053 , 25040151 , PCV220 , 06487532 , 76-2782 , CV746C , PV769 , 25042723 , 06484525 , FV160 , CV769C , 6P1043 , 045-0334 , 76-2781 , PCV73 , HV73 , 6487530 , CV746CB , 8F9 , CV769CB

Qty:
$6.17
Standard Ignition PCV Valve
  • PCV Valve
  • Product Attributes:
    • Connector Gender: No Connector
    • Contents: Valve
    • Hose Size - Inches: 3/8
    • Hose Size - mm: 10 Mm
    • Nipple Orientation: Straight
  • With industry leading expertise, when original equipment fails our products are designed to fix the inherent failure issues. As a global manufacturer of emission components, complete quality control is maintained through the manufacturing process from componentry to finished product.
Brand: Standard Ignition
Additional Fitment Information:
Vehicle Block Engine CID CC
1975 - Mercury Capri V 6 Cyl 2.8L 171 -
Standard Ignition
1996 Mercury Mystique PCV Valve 6 Cyl 2.5L Standard Ignition

P311-3ECB86F    V339  New

PCV203 , EV152D , F5DZ 6A666 C , FV352 , 2P1 , GYY1-13-890 , 76-2580 , PV152 , FV374 , 19110616 , 19112432 , PCV400 , PCV206 , 6P1103 , 78144 , CV5053C , F6DZ-6A666C , F6DZ-6A666D , PCV220 , HV193 , 045-0340 , PC373 , 28066 , HV177

Qty:
$8.78
Standard Ignition PCV Valve
  • PCV Valve
  • Product Attributes:
    • Contents: Valve
    • Hose Size - Inches: 3/8";5/8";3/4"
    • Hose Size - mm: Refer To Inches
    • Nipple Orientation: Angled
  • With industry leading expertise, when original equipment fails our products are designed to fix the inherent failure issues. As a global manufacturer of emission components, complete quality control is maintained through the manufacturing process from componentry to finished product.
Brand: Standard Ignition
Additional Fitment Information:
Vehicle Block Engine CID CC
1996 - Mercury Mystique V 6 Cyl 2.5L 155 2450
Standard Ignition
2001 Mercury Sable PCV Valve Standard Ignition

P311-1813BA4    V371  New

19146023 , 76-2717 , EV268 , 6P1260 , PCV391 , 76-2647 , 6P1169 , 76-2686 , AJ03-13-890B , PCV355 , PCV304 , 045-0356 , PCV255 , 76-2668 , 2L5Z-6A666-BA , 1F22-13-890 , 6P1226 , 6P1107 , 1L5Z-6A666AA , YF1Z-6A666AA , PCV330 , PCV483 , EV243 , 214-1996 , 1F22-13-890A , AJ03-13-89X

Qty:
$13.37
Standard Ignition PCV Valve
  • PCV Valve
  • With industry leading expertise, when original equipment fails our products are designed to fix the inherent failure issues. As a global manufacturer of emission components, complete quality control is maintained through the manufacturing process from componentry to finished product.
Brand: Standard Ignition
Additional Fitment Information:
Vehicle Cylinder Head Type
2001 - Mercury Sable DOHC
Motorcraft
2009 Mercury Mariner PCV Valve 4 Cyl 2.5L Motorcraft

P311-243A170    W0133-1700193  New

Qty:
$37.61
Motorcraft PCV Valve
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
Brand: Motorcraft
Additional Fitment Information:
Vehicle Submodel Block Engine CID CC
2009 - Mercury Mariner Premier L 4 Cyl 2.5L 152 2488

Latest Mercury Repair and PCV Valve Installation Advice

CarJunky AutoAdvice

pcv and mitchell

Showing 4 out of 4 Posts
Question From jdwill01 on pcv and mitchell

Hello, I am an auto tech school student.
As an exercise I just did a tune up on a 2001Mercury Sable LS 24V DOHC.
It has 100,000 miles.
After the tune up I realized I had failed to follow the maintenance schedule which says to replace the spark plugs and PCV valve. I only replaced the spark plugs. Out of curiosity I began to research the location of the PCV valve though I do not plan to replace it at this time.

Through school I have access to Mitchell online service (ondemand5.com).
I am having a rough time locating the PCV valve with this service. The estimator says replacing the PCV valve takes .5 hours.
My hunch is the PCV valve is under the Upper intake manifold, if so , I do not see how this estimate is possible in that I feel it takes at least 20-25 minutes to properly disconnect everything and get the manifold off (I feel this because I took the manifold off for the manifold).

May someone please a few questions and for this I would be very helped and appreciative.

1. Is the Mitchell estimate correct? And am I doing anything wrong looking for the PCV valve location on there?

and 2. May you please tell me the location of the PCV valve?

Thank you for your time,
Jeff


(disabled the link)

Response From Hammer Time

Here are the instructions from Alldata. The labor time is about right.

Response From jdwill01 Top Rated Answer


Thank you for replying. When I did the tune up I shyed away from removing the accelerator cable because I didn't want to mess anything up. Can you tell me if the accelerator cable is difficult to remove from the throttle body? Judging from the labor time I started to assume it is not that difficult.

Thanks again Hammer Time,
Jeff

Response From Hammer Time

Most of the Fords just have a socket that snaps on to a ball. Nothing complicated.

2000 Mercury Cougar Bucking like hell during acceleration

Showing 2 out of 8 Posts | Show 6 Hidden Posts
Question From clintsharpe on 2000 Mercury Cougar Bucking like hell during acceleration

Alright, so I have a 2000 mercury cougar, v6 2.5L, 5 speed with a little bit over 140,000 miles and for some reason it likes to buck hard during acceleration. It only does this when I am below half a tank of gas, when it is over half it seems to run pretty well. This drives me crazy, it does this around 2rpm's and if I continue to put my foot on the gas pedal it does it even harder so I have to let go and ease it. Once I get to 4th gear it doesn't buck anymore and drives okay, just during 1st thru 3rd. I replaced the fuel filter, also bought some fuel injector cleaner and yet the problem still continues.. I have been told that it might be the fuel pump but I'm not sure and do not know where it is located in the vehicle. I just want this to stop so I can cruise and get on it every once in awhile without this happening! Lol, so feel free to tell me what causes this problem.

Response From Hammer Time

You need to rig a fuel pressure gauge that can be monitored while driving so you can see if the pressure maintains spec at all times.

Response From clintsharpe

where would I find one of these? lol and how will this fix my situation?

Response From Hammer Time

First comes the diagnosis and then comes the fix. You can get one at any place that sells tools. Autozone may even have a loaner program.

Response From Discretesignals

Diagnosing that would save you a lot of time and money. That or put a saddle on it and enter it into a rodeo...LOL.

Response From clintsharpe

ahh, I see. well yesterday I got a test on it because my engine light came on so a buddy and I went to a advanced auto parts and I don't recall the code that came up but my friend was looking around my engine, we cleaned the air flow sensor and he took apart my intake manifold, found a bit of oil inside, also he found a rip in the pcv tube leading to the intake, could this be the cause of the bucking? cause I'm pretty sure there shouldn't be oil in there..

Response From Hammer Time

You need to get that number and post it here too.

Response From clintsharpe Top Rated Answer

alright, well on wednesday I am going to a dealership to get a new pcv valve and pcv tube to see if this will help, my buddy says there shouldn't be oil running through the hose that is connected to the air filter, sorry if my explaining isn't helping.. not much of a mechanic.. haha

working with vacuum gauge

Showing 2 out of 28 Posts | Show 26 Hidden Posts
Question From zoggnoff on working with vacuum gauge

I can't seem to figure this thing out.
The only reading I could get off the gauge was when I took the PCV valve off and shoved the tapered end fitting into the pcv line, it read 13 in.
Not sure if I had the intake manifold vacuum line, is it the line that connects to the air assembly duct?? because that was 0 in.
and I can't find the EGR at all.

This book gives me one picture, sometimes no picture at all.

it's an 03 eclipse v6 3.0L

Response From Tom Greenleaf Top Rated Answer

Vacuum gauge is an excellent diagnostic tool. Not sure if PCV gets true "Manifold Actual Pressure" (meaning vacuum) or not. A pwr brake booster should! Best to use a "T" so the device still is enabled.

FYI: Atmosphere is 14.7 PSI at sea level. Vacuum gauges are measuring "inches of mercury or HGs" so not the same math. At sea level you see the full # which if perfect is 29.92 Hg. Engine vacuum at sea level should be around 18 or so and with a rev show over 20 then be stable again.

You can deduct ONE Hg per 1,000 feet of elevation.

Hope that helped??

What is your elevation? Google Earth will tell you by the foot! I'm at 232' for example!
T

Response From zoggnoff

google earth puts me at elev 9ft

Response From Tom Greenleaf

Consider that true readings or "Sea Level" for any use of the device. I do at under 1,000 which is most of the populated world. The day's atmospheric pressure has an impact as well. Once in a while someone will ask me about some #s and live at "mile high" Denver, CO or even higher!

Just for fun - heard that aircraft sets cabin pressure as if you were at up to 10,000 ft and hope you aren't working on a car in the plane but it clearly has a different feel to it to me anyway and air is drier.

Vacuum is a great tool as said for auto engines and air conditioning of course. Look for steady needle (valves good) - drifting needle (a gasket leak) - consistently low - (valve timing off perhaps) -- there's lots.

Learn where to check such that it's "actual" vacuum and not "venturi" vacuum.

Vacuum can tell of an exhaust restriction as well!

T

Response From zoggnoff

I've been sick for 4 days now. I was in the middle of doing this test when I saw the news today.
wow.

moving on though. The test results were 14 in
bobbled between 12 and 14 in as the idle bobbled between 800 and 1100 rpms

dropped even lower when I unplugged the pcv valve but then the idle speeds up and the in Hg go back up
could this be a vac leak?
if so i'd like to replace all the vac lines, where can i buy new vac lines?
are they all the same size?
they seem to be nearly the same to me

Response From zoggnoff

also according to the multimeter i used on the TPS it went from 0.2 to 4.8
supposed to be 3.5 to 6.5 k when moving the throttle while hooked up to the meter.

could this be the source of all these damn problems?

Response From Loren Champlain Sr

zoggnoff; You should be seeing 17-19hG at idle. As Tom suggested, 'T' into the vacuum booster line or find a manifold vacuum hose. If your vacuum is lower than it should be, it could be caused by poor running condition. Retarded timing, overfueling, misfiring, ect. The TPS voltage wouldn't come into play, at idle. However, as you sweep the TPS with your multimeter, watch for 'glitches'. If there are any, it should be replaced. Also, what kind of symptoms are you dealing with?

Response From zoggnoff

Not sure where the booster line is but I was able to get hold of a Factory Service Manual for my specific vehicle, much better pictures of where things are.
was able to pin point all the parts that eluded me before, also according to it the best place to T-in is between the fuel pressure regulator and the intake manifold plenum, which I found and T'd into. Had to trim some tube from my new gauge to make it possible but I was able to get a 14 in reading from it.
Stepping on the gas then letting off quickly went from 14 in hg quickly to 0 in hg then quickly to 25 in hg then slowly back to 14 in hg... but the RPMs drop very slow as well and settle at about 1100 RPMS.
figured it should have dropped quickly in park but didn't.

My symptoms are rough somewhat irradic and sometimes high idle and low vacuum.
the oil leaks and the car smells bad sometimes.
had to recently replace the IAC because it was rough like this before, but instead of idling high it would just stall and the IAC eventually stuck closed and tested dead.

Im affraid that under whatever stress that is going on under the hood that this new part may soon be tossed into the trash with the old one.
part was hella-expensive

What should i do?

Response From Tom Greenleaf

Rough idle and 14 reading - not right. What vehicle and engine are we talking about and how many miles?

T

Response From zoggnoff

2003 mitsubishi eclipse gt
v6 3.0L
133,000 miles

Response From Tom Greenleaf

The fact that it could do that snap to 25 is good. Rough idle will not give you a steady, dependable reading but normally would be 17-19 as Loren said.

It's one tool in tool box. Need to chase down the rough idle now - manifold vacuum leaks, tune up items etc,

T

Response From zoggnoff

Just got in the mail, vacuum pump/brake bleed kit so i can check the EGR & solenoid among other things.
too late in the day to use it now but I did spray carb spray all over the throttle body where it butted up to the manifold and there was no change in idle.
sprayed the manifold itself too but i'm not familiar with that part of the engine so i may not have sprayed the right spots but i did try to spray everything on it that wasn't rubber or plastic because i now the solvent destroys those materials. still no change in the idle.

if it's not the manifold leaking and if I replace all the vacuum hoses and if the EGR and solenoid pass a vac test could it be the spark plugs and or wires, rotor and cap? the plugs were replaced once but the engine has been running hot, very hot. I'd say for the better part of 2 years the engine would overheat until eventually the radiator blew a hole in the top and had to be replaced, still overheated, replaced the thermostat and problem with heat solved.

what steps should i be making?

Response From Loren Champlain Sr

zoggnoff; Check for a vacuum leak at the EGR valve, itself. Sometimes a chunk of carbon can get stuck between the pintle and seat. Be careful not to try and apply too much vacuum to the EGR as you could rupture the diaghragm. It may not hold vacuum if it is a backpressure type valve, so don't condemn it if it doesn't. EGRs are usually quite easy to remove and inspect. Once off, if nothing is visible, you can pour liquid in one side and see if leaks through. It shouldn't.

Response From Tom Greenleaf

Good one Loren. Pintle can be cleaned - push up and down on it with carb cleaner in the inlet side. Real good one will not leak out even thin viscosity of carb cleaner! You may be able to save gasket with high temp Permatex sealer.

Vacuum. That one I disagree with. Diaphragm should hold a hand held vacuum at max. If it ruptured at full vac it tisn't good IMO. Remember or know that atmosphere is only 14.7 psi that we live in. Expressed in "inches of mercury" max vacuum ism 29.92. Engines run on creating a vacuum to draw then compress vaporized fuel and air. Short of pushing air (turbo type/ram air stuff) the most the can get is the 14.7 in PSI and they don't ever show that. Said earlier by Loren engines will show 17-19 Hg at a smooth idle.

Pun intended - vacuum is a cool tool which sucks! Laugh!



T

Response From Loren Champlain Sr

Tom; Backpressure type EGR valves won't hold vacuum unless backpressure is present. Weird, I know. Don't ask me how it works.

Response From Tom Greenleaf

My only point was 100% vacuum is only 14.7 psi in reverse pressure. Any vacuum item that fails with just that probably tisn't any good.

Please understand we are all here to help and LEARN too! It's a never ending cycle to keep up with what parts do what and what they tolerate.

Old Pharts unite!

T

Response From Loren Champlain Sr

>>It's a never ending cycle to keep up with what parts do what and what they tolerate.

Old Pharts unite! <<
Oh, how very true! Didn't mean that thing about the backpressure EGR valve to be anything other than informative. Didn't know if you'd run into one before. Sorry if I stated it wrong.

Response From Tom Greenleaf

We (speaking of regulars) are here to help and we learn too! If any one of us thought they knew everything it's proof we don't!

The only failure is not trying. It's my opinion that any vehicle diaphragm will hold full vacuum. As to back pressures - that's a different problem/issue,

T

PS: Thought for the day. If you took a tire with 1lbs of true air into outer space or a complete vacuum it would read 14. something PSI! A tire at 35 psi would increase by the 14.7 - just examples from my out of space missions

Response From Loren Champlain Sr

>> If any one of us thought they knew everything it's proof we don't!

The only failure is not trying.<<
How True!!!! I'm trying to remember my emissions class...Were dealing with a GM EGR valve. With vacuum going to it, it wouldn't open unless it sensed exhaust backpressure and the diaghragm wouldn't hold vacuum unless the backpressure was present? On the other hand, that was back when I had a brain. Probably, 20yrs ago? Hopefully, one of the younger guys with some brain cells left will jump in here. LOL.

Response From Hammer Time

Feedback EGR valves are very common and you are correct, they won't hold vacuum unless they get exhaust pressure first.

Response From Tom Greenleaf

I'm good and confused. I can see that and EGR could be designed to sense pressure one way before activating vacuum to a diaphragm but don't understand if full vacuum it damaging??

T

Response From zoggnoff

book says 5-to-10 in-Hg vacuum to EGR valve with engine idle, if speed does not drop considerably (or stall) indicates possible faulty EGR valve, blocked or plugged EGR tube or passage in intake and exhaust manifolds may be plugged with carbon build-up.
EGR vavle unbolted apply 15 in-Hg vacuum, if stem moves it's good.

Picked up 3 spark plugs and some anti-seize compound for the front. I figure why not change the easiest plugs first, see if any changes, they were $2 a piece
had a random misfire code at idle again, cleared, didn't come back.

have not tested nor replaced parts yet (plugs included) still waiting for some tools to arrive

Response From Tom Greenleaf

Interim note: Watch out for anti-seize (alum stuff) - make sure on threads only - It can conduct electrical energy and mess us diagnostics.
T

Response From zoggnoff

changed the front three plugs, no effect on how it ran.
currently getting a p0401 code.
so definitely need to check the valve and stuff... but could that code just be a result of having a low vacuum reading of 14 in-hg?
engine was knocking.

I have some new silicone tubing on order to replace vacuum lines, will have soon, i figure once that arrives i will clean out the metal parts of the tubing on the vac system with wire pipe cleaner brush and some carb spray, also sometime on that day test the vac system integrity itself with the pump etc etc.

what do you think?

Response From carsinsc

Have you done a compression test on this motor? If it was overheated, you may have low compression causing your problems. A leak down test would help verify wether your valves are sealing properly. Start with the basics before you throw a bunch of money at a problem that can't be fixed by just replacing parts. Poor compression = poor running.

Response From Tom Greenleaf

carsinsc: This thread is well over a year old. Welcome to the site but take note of the dates of the threads,

T

Response From Hammer Time

It's not being damaged. The vacuum just get bypassed until the exhaust backpressure closes the vent.

Response From Tom Greenleaf

Got it - thanks!

Tom

What are the chances of

Showing 2 out of 6 Posts | Show 4 Hidden Posts
Question From Guest on What are the chances of

Had 99 Mercury sable repaired Mechanic said bad head gaskets, he fixed then for $1250 car did not even drive 1 nile and same thing happened then he told us bad intake manifold and then that did'nt work he said that it had cracked cylinders making it a 3 problem issue. Did we get taken or were all those problems possible or did he go the last resort replace engine to fix problem. Original problem the PC valve blew out and oil had water in it.

Response From Guest

Possibly replaced the head gaskets without checking to see if the heads were cracked.

Response From frustrated Top Rated Answer

He sent heads out to machine shop so he says and they were warped and they supposedly were shaved or whatever they do. My question is if the head job was not done right would the same thing happen pcv valve blowing and then water in oil. I think that he went to the last resort saying engine was bad because he wasn't capable of finding the problem. When we got the car back he suggested a oil change within a week because the oil was still a little milky, but didn't have a chance to do that because the car failed less than a mile. I think that we just got a sleezy mechanic. he gave us a 90 warranty on parts and labor and I think that since he did not fix original problem I should not have to pay anything more to have the car fixed.

Response From Tom Greenleaf

The pcv blowing out would be consistant with tons of blowby thru a piston. They were there looking at this! If heads were in need of resurfacing due to warpage that's an alarm to check hard for other things. People make mistake and sometimes stuff just gets unoticed but when enough damage is seen the first time then you should have been consulted as to how you wanted to approach this.

If enough coolant leaked in to cause compression lock or crack top of a piston this would have had wild symptoms real quick. I'm not there. You need to work this out with the shop. At this point the original head gasket job was a waste!

T

Response From Tom Greenleaf

Heads should be sent out to machine shop for head gasket replacements. If not it's a crap shoot. Mechanics should know this and that's a reason this job isn't just tossing in 30-40 bucks in gaskets. It failed within a mile! Did they even check their work? Why now do they feel so confident of two other problems??

T

Response From frustrated

the mechanic said that he sent the heads out to shop and they had to be shaved because they were warped, he ran the car for a while when he was done. He said that he recommended a oil change within a week because it was still a little milky. The argument he is giving us is that the heads were bad then when he went further after that he found crack in lower intake and then when he fixed that he then did a compression or some dye test and it showed the cylinder problem. He said we had 3 problems but I feel if it was the engine he should have found that out before he did any other work.

2002 Ford Focus Idle problem

Showing 2 out of 9 Posts | Show 7 Hidden Posts
Question From Tk27 on 2002 Ford Focus Idle problem

2002 Ford Focus SOHC
My daughters car started a couple of weeks ago, when the car warms up its hard to get accelation at a stop and idle rough. It smooth out some once you get moving.
Replaced catalytic converter $658.00 California emissions , fuel pump and still didnt help. No codes have ever come up in the computer. Took to a mechanic thats the best in town diagnosing hard to fine problems. He has given up and said must be in the computer even though he gets no codes. He replaced the fuel pump and module (Ford Part) and it didnt help, he checked exhaust , mass air flow sensors, and so on. He said its ok until the car warms up. He a great mechanic and he worked on it for a week trying to find the problem. Any ideals would be appreciated. Thanks

Response From zx5user


2002 Ford Focus SOHC
My daughters car started a couple of weeks ago, when the car warms up its hard to get accelation at a stop and idle rough. It smooth out some once you get moving.
Replaced catalytic converter $658.00 California emissions , fuel pump and still didnt help. No codes have ever come up in the computer. Took to a mechanic thats the best in town diagnosing hard to fine problems. He has given up and said must be in the computer even though he gets no codes. He replaced the fuel pump and module (Ford Part) and it didnt help, he checked exhaust , mass air flow sensors, and so on. He said its ok until the car warms up. He a great mechanic and he worked on it for a week trying to find the problem. Any ideals would be appreciated. Thanks

Response From Hammer Time

What part of don't post to this old thread didn't you understand?

Response From zx5user

Just fixed my idle problem by replacing the overdrive solenoid. It gave all the symptoms of fueling problems before
the solenoid actually failed and gave out a failure code. I took it to the dealer twice and an Indepedent shop once,
all said everything was fine with the fueling/emissions system, no error codes.

My mechanic has a theory - he thinks the Overdrive solenoid starts to fail before it will give an error code.
During the failure it will keep the torque converter locked up at times when it should not be. This puts
a strain on the engine that reduces its ability to keep a normal idle and even causes the car not to idle,
but you can rev it up and keep in going. It is intermittant which is the problem.

This solenoid is a common failure part, it is very small and is probably an systemic engineering flaw
in an automatic Focus from your era. Chevy had the similar problem part. You will see many complaints and problems
with this part and the electric window regulators on this model. The selonoid will fail again.

Response From nickwarner

While that was indeed good to know, this thread is a year old. I'm sure the poster has taken care of it. Please read the forum rules at the top of the catergory. When you post to an old thread like this everyone who has ever posted to it gets an email notification and for us who are mods here the inbox gets full fast. For the people who made the thread it gets annoying. Please look at dates prior to posting a reply from now on.

Response From Discretesignals Top Rated Answer

Does it feel like it is misfiring? Did you mechanic use a high end scan tool to look at mode$06 info to see if there are any misfires going on in TID $53? If it is misfiring, it may have not reached the threshold for creating a trouble code yet. What are the long and short term fuel trims reading when the problem is occurring?


Here is an interesting TSB that may relate:

Article No.04-9-105/11/04
^ DRIVEABILITY - ROUGH IDLE, LOW POWER AND/OR STALL AT IDLE WITH DIAGNOSTIC
TROUBLE CODES (DTCS) P0300-P0304 STORED IN MEMORY - VEHICLES EQUIPPED WITH 2.0L SPI ENGINE ONLY^

ELECTRICAL - MALFUNCTION INDICATOR LAMP (MIL) ILLUMINATED - DIAGNOSTIC TROUBLE CODES (DTCS) P0300-P0304 STORED IN MEMORY -
VEHICLES EQUIPPED WITH 2.0L SPI ENGINE ONLY
FORD:1997-2002 ESCORT2000-2002 FOCUS MERCURY: 1997-1999 TRACER

This article supersedes TSB 02-09-01 to update the service and part information.

ISSUE
Some vehicles equipped with the 2.0L SPI engine may exhibit a malfunction indicator lamp (MIL) illuminated and diagnostic trouble codes (DTCs) P0300 through P0304 stored in memory. The vehicle may also have a rough idle or reduced power condition, and/or may stall at an idle. This may be caused by sticking exhaust valves due to excessive carbon build-up.

ACTION

Check for faulty fuel injectors and ignition wires. One or more exhaust valves may be temporarily sticking due to carbon build-up between the valve stem and guide. If the diagnostic checks point to a sticking exhaust valve, the cylinder head assembly may need to be replaced with a new level cylinder head assembly with revised valve guides, revised exhaust valves will also need to be installed to help prevent carbon build-up. Refer to the following Service Procedure for details.

SERVICE PROCEDURE
NOTE THIS PROCEDURE APPLIES ONLY TO THE 2.0L SPI ENGINE.This condition usually results in misfire when the engine returns to idle after running approximately 2000 RPM or higher.

1. Use the worldwide diagnostic system (WDS) to test for Power Balance with the engine at idle. Check for cylinder misfire. If misfire is occurring constantly, go to Step 3.

If misfire is not occurring, attempt to induce misfire by performing the following step:
a. Apply the parking brake and keep the transmission in Park or Neutral. Bring the engine to approximately 2800 RPM and hold for one (1) minute. Check the WDS Power Balance display while holding engine speed constant. Allow the engine to return to idle and watch the WDS Power Balance display for a misfiring cylinder.

2. If WDS Power Balance indicates a misfiring cylinder with the previous test, one or more exhaust valves may be intermittently sticking due to carbon build-up between the valve stem and guide. Replace the cylinder head with the new level cylinder head with revised valve guides. Once stock is exhausted of the loaded cylinder heads, the cylinder head will come bare so revised exhaust valves will need to be installed in place of the original valves. The revised valve guides and exhaust valves help prevent carbon build-up.

Consult the appropriate model year Workshop Manual for removal and installation procedures for the Cylinder Head Assembly.

3. If WDS Power Balance did not indicate a misfiring cylinder with the previous test or a misfire is occurring constantly, the misfire may not be due to a sticking exhaust valve. Refer to the appropriate model year Powertrain Control/Emissions Diagnosis (PC/ED) Service Manual for further diagnosis. Other possible causes may be, worn or arcing ignition wires, base engine compression, fuel injectors, fuel injector harness resistance or PCM injector driver signal. Perform diagnosis and repair as necessary.

4. After completing either Step 2 or Step 3, replace the PCV Valve (YS4Z-6A666-AC) (Motorcraft EV-244) on model year 2000-2002 Focus or 2000-2002 Escort. Vacuum fluctuations from engine misfire may prematurely wear the PCV valve on those applications.NOTE THE CYLINDER HEAD ASSEMBLIES LISTED BELOW WILL BE BARE CASTINGS ONCE SUPPLY OF LOADED HEADS IS EXHAUSTED, IN MOST CASES IT WILL BE NECESSARY TO REPLACE ONLY THE PARTS LISTED BELOW, ALL OTHER PARTS CAN BE REUSED.

Response From Tk27


Does it feel like it is misfiring? Did you mechanic use a high end scan tool to look at mode$06 info to see if there are any misfires going on in TID $53? If it is misfiring, it may have not reached the threshold for creating a trouble code yet. What are the long and short term fuel trims reading when the problem is occurring?

It has misfired... Thank you for the information , i was just trying to get better informed before i go to the dealer..The catalytic converter was deferentially bad, he showed it to me, I dont know if that helps.

Response From zmame

I would take coil pack off an inspect it for cracks. Also check spark wire terminal for signs of carbon or rust.. These cars are famous for engine mounts too they shake alot when idle in gear stopped.

Also check actual fuel pressure and with scanner and make sure they match.. The pump voltage is controlled by the fuel pump module and fuel rail pressure sensor to regulate pressure.. if the pressure sensor is not reading properly it will cause low or high fuel pressures.

In some 2.0L SPI SOHC have been knowen to fracture or drop valve seats causing low compression on a cylinder(usally #4 cylinder). This can be checked with a compression test.

Check fuel trims with scanner make sure they are within + or - 5% on short and long.

Also if the old converter came apart there is a chance that a part of it is still stuck in the exhaust somewhere and plugging the exhaust periodically. This can be checked with back pressure gauge or you can use a vacumm gauge to check for backpressure..

EGR could be partially stuck open.

Response From Tk27

Thanks guys for your input