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Best Selling Genuine International EGR Valves

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  • Constantly Updated Inventory of International Replacement EGR Valve Parts

Dorman
2005 International 9200i SBA EGR Valve Dorman

P311-45D58B7    904-5001  New

3101917 , 4955422NX , 3684004 , 3682805 , 4955422RX , 3682551 , 3682974 , 4955422 , 3104874 , 3682954 , 3683446 , 3683305

Qty:
565.51
Dorman EGR Valve
  • ; 2003 EPA Standard
  • Product Attributes:
    • California Proposition 65: Warning: Cancer And Reproductive Harm – Www.p65warnings.ca.gov
    • Connector Shape: Rectangular
    • EGR (Exhaust Gas Recirculation) Valve Operation Type: Electronically Operated
    • Mounting Type: Bolted
    • Operation Type: Electrical
    • Package Contents: 1 Egr Valve And Gasket
    • Terminal Quantity: 2
    • Terminal Type: Pin
    • Vacuum Port Quantity: 0
Brand: Dorman
Additional Fitment Information:
Vehicle Engine Designation
2005 - International 9200i SBA ISX 15.0
Dorman
2004 International 7600 EGR Valve Dorman

P311-058FE7A    904-5002  New

3103077 , 4921905 , 2102745 , 4955421 , 4955421RX , 3103765 , 3103361 , 3104875 , 3103824 , 3104230

Qty:
572.44
Dorman EGR Valve
  • ; 2003 EPA Standard
  • Product Attributes:
    • California Proposition 65: Warning: Cancer And Reproductive Harm – Www.p65warnings.ca.gov
    • Connector Quantity: 2
    • Connector Shape: Rectangular
    • EGR (Exhaust Gas Recirculation) Valve Operation Type: Electronically Operated
    • Mounting Type: Bolted
    • Operation Type: Electrical
    • Package Contents: 1 Egr Valve And Gasket
    • Terminal Quantity:
      • 2
      • 3
    • Terminal Type: Pin
    • Vacuum Port Quantity: 0
    • Vacuum Port Size: 0
Brand: Dorman
Additional Fitment Information:
Vehicle Engine Designation
2004 - International 7600 ISM 10.8
Dorman
2005 International 9900i EGR Valve Dorman

P311-058FE7A    904-5002  New

3103077 , 4921905 , 2102745 , 4955421 , 4955421RX , 3103765 , 3103361 , 3104875 , 3103824 , 3104230

Qty:
572.44
Dorman EGR Valve
  • ; 2003 EPA Standard Engine Desg. ISM-330
  • Product Attributes:
    • California Proposition 65: Warning: Cancer And Reproductive Harm – Www.p65warnings.ca.gov
    • Connector Quantity: 2
    • Connector Shape: Rectangular
    • EGR (Exhaust Gas Recirculation) Valve Operation Type: Electronically Operated
    • Mounting Type: Bolted
    • Operation Type: Electrical
    • Package Contents: 1 Egr Valve And Gasket
    • Terminal Quantity:
      • 2
      • 3
    • Terminal Type: Pin
    • Vacuum Port Quantity: 0
    • Vacuum Port Size: 0
Brand: Dorman
Additional Fitment Information:
Vehicle
2005 - International 9900i
Dorman
2005 International 9900i EGR Valve Dorman

P311-058FE7A    904-5002  New

3103077 , 4921905 , 2102745 , 4955421 , 4955421RX , 3103765 , 3103361 , 3104875 , 3103824 , 3104230

Qty:
572.44
Dorman EGR Valve
  • ; 2003 EPA Standard Engine Desg. ISM-370
  • Product Attributes:
    • California Proposition 65: Warning: Cancer And Reproductive Harm – Www.p65warnings.ca.gov
    • Connector Quantity: 2
    • Connector Shape: Rectangular
    • EGR (Exhaust Gas Recirculation) Valve Operation Type: Electronically Operated
    • Mounting Type: Bolted
    • Operation Type: Electrical
    • Package Contents: 1 Egr Valve And Gasket
    • Terminal Quantity:
      • 2
      • 3
    • Terminal Type: Pin
    • Vacuum Port Quantity: 0
    • Vacuum Port Size: 0
Brand: Dorman
Additional Fitment Information:
Vehicle
2005 - International 9900i
Dorman
2005 International 9900ix EGR Valve Dorman

P311-058FE7A    904-5002  New

3103077 , 4921905 , 2102745 , 4955421 , 4955421RX , 3103765 , 3103361 , 3104875 , 3103824 , 3104230

Qty:
572.44
Dorman EGR Valve
  • ; 2003 EPA Standard Engine Desg. ISM 10.8
  • Product Attributes:
    • California Proposition 65: Warning: Cancer And Reproductive Harm – Www.p65warnings.ca.gov
    • Connector Quantity: 2
    • Connector Shape: Rectangular
    • EGR (Exhaust Gas Recirculation) Valve Operation Type: Electronically Operated
    • Mounting Type: Bolted
    • Operation Type: Electrical
    • Package Contents: 1 Egr Valve And Gasket
    • Terminal Quantity:
      • 2
      • 3
    • Terminal Type: Pin
    • Vacuum Port Quantity: 0
    • Vacuum Port Size: 0
Brand: Dorman
Additional Fitment Information:
Vehicle
2005 - International 9900ix
Dorman
2014 International WorkStar 7600 EGR Valve Dorman

P311-4FFEC32    904-5018  New

3018707C1 , 3007667C91 , 2512163C92

Qty:
1,251.05
Dorman EGR Valve
  • ; 2014 EPA Standard Engine Desg. MaxxForce 13
  • Product Attributes:
    • California Proposition 65: Warning: Cancer And Reproductive Harm – Www.p65warnings.ca.gov
    • Connector Shape: Square
    • EGR (Exhaust Gas Recirculation) Valve Operation Type: Electronically Operated
    • Mounting Hole Quantity: 8
    • Mounting Type: Bolt-on
    • Operation: Electrical
    • Operation Type: Electrical
    • Package Contents: 1 Egr Valve, 14 Bolts, 5 Gaskets
    • Positive Or Negative Backpressure: Positive
    • Terminal Quantity: 6
    • Terminal Type: Blade
    • Vacuum Port Quantity: 0
Brand: Dorman
Additional Fitment Information:
Vehicle
2014 - International WorkStar 7600
Dorman
2014 International 7600 EGR Valve Dorman

P311-4FFEC32    904-5018  New

3018707C1 , 3007667C91 , 2512163C92

Qty:
1,251.05
Dorman EGR Valve
  • ; 2014 EPA Standard
  • Product Attributes:
    • California Proposition 65: Warning: Cancer And Reproductive Harm – Www.p65warnings.ca.gov
    • Connector Shape: Square
    • EGR (Exhaust Gas Recirculation) Valve Operation Type: Electronically Operated
    • Mounting Hole Quantity: 8
    • Mounting Type: Bolt-on
    • Operation: Electrical
    • Operation Type: Electrical
    • Package Contents: 1 Egr Valve, 14 Bolts, 5 Gaskets
    • Positive Or Negative Backpressure: Positive
    • Terminal Quantity: 6
    • Terminal Type: Blade
    • Vacuum Port Quantity: 0
Brand: Dorman
Additional Fitment Information:
Vehicle Engine Designation
2014 - International 7600 MaxxForce 13
Dorman
2013 International ProStar EGR Valve Dorman

P311-20D97BB    904-5053  New

3007667C93 , 7092735C93 , 5010696R94 , 7092735C94

Qty:
1,404.09
Dorman EGR Valve
  • ; 2010 EPA Standard
  • Product Attributes:
    • California Proposition 65: Warning: Cancer And Reproductive Harm – Www.p65warnings.ca.gov
    • Connector Shape: Square
    • EGR (Exhaust Gas Recirculation) Valve Operation Type: Electronically Operated
    • Mounting Hole Quantity: 5
    • Mounting Type: Bolt-on
    • Operation: Electrical
    • Operation Type: Electrical
    • Package Contents: 1 Egr Valve, Mounting Hardware; Gaskets
    • Positive Or Negative Backpressure: Negative
    • Terminal Quantity: 6
    • Terminal Type: Blade
    • Vacuum Port Quantity: 0
Brand: Dorman
Additional Fitment Information:
Vehicle Engine Designation
2013 - International ProStar MaxxForce 13
Dorman
2012 International LoneStar EGR Valve Dorman

P311-20D97BB    904-5053  New

3007667C93 , 7092735C93 , 5010696R94 , 7092735C94

Qty:
1,404.09
Dorman EGR Valve
  • ; 2010 EPA Standard Engine Desg. MaxxForce 13 International
  • Product Attributes:
    • California Proposition 65: Warning: Cancer And Reproductive Harm – Www.p65warnings.ca.gov
    • Connector Shape: Square
    • EGR (Exhaust Gas Recirculation) Valve Operation Type: Electronically Operated
    • Mounting Hole Quantity: 5
    • Mounting Type: Bolt-on
    • Operation: Electrical
    • Operation Type: Electrical
    • Package Contents: 1 Egr Valve, Mounting Hardware; Gaskets
    • Positive Or Negative Backpressure: Negative
    • Terminal Quantity: 6
    • Terminal Type: Blade
    • Vacuum Port Quantity: 0
Brand: Dorman
Additional Fitment Information:
Vehicle
2012 - International LoneStar
Dorman
2013 International WorkStar 7600 EGR Valve Dorman

P311-20D97BB    904-5053  New

3007667C93 , 7092735C93 , 5010696R94 , 7092735C94

Qty:
1,404.09
Dorman EGR Valve
  • ; 2010 EPA Standard Engine Desg. MaxxForce 13
  • Product Attributes:
    • California Proposition 65: Warning: Cancer And Reproductive Harm – Www.p65warnings.ca.gov
    • Connector Shape: Square
    • EGR (Exhaust Gas Recirculation) Valve Operation Type: Electronically Operated
    • Mounting Hole Quantity: 5
    • Mounting Type: Bolt-on
    • Operation: Electrical
    • Operation Type: Electrical
    • Package Contents: 1 Egr Valve, Mounting Hardware; Gaskets
    • Positive Or Negative Backpressure: Negative
    • Terminal Quantity: 6
    • Terminal Type: Blade
    • Vacuum Port Quantity: 0
Brand: Dorman
Additional Fitment Information:
Vehicle
2013 - International WorkStar 7600
Dorman
2010 International 4300 EGR Valve Dorman

P311-289D093    904-5056  New

1873842C92 , 1878918C1 , 1875808C1 , 1878918C2

Qty:
506.70
Dorman EGR Valve
  • ; 2007 EPA Standard
  • Product Attributes:
    • California Proposition 65: Warning: Cancer And Reproductive Harm – Www.p65warnings.ca.gov
    • Connector Shape: Square
    • EGR (Exhaust Gas Recirculation) Valve Operation Type: Electronically Operated
    • Mounting Type: Bolted
    • Operation Type: Electrical
    • Package Contents: 1 Egr Valve, Gaskets
    • Terminal Quantity: 6
    • Terminal Type: Pin
    • Vacuum Port Quantity: 0
Brand: Dorman
Additional Fitment Information:
Vehicle Engine Designation
2010 - International 4300 MaxxForce DT
Dorman
2008 International 3200 EGR Valve Dorman

P311-289D093    904-5056  New

1873842C92 , 1878918C1 , 1875808C1 , 1878918C2

Qty:
506.70
Dorman EGR Valve
  • ; 2007 EPA Standard Engine Desg. DT466
  • Product Attributes:
    • California Proposition 65: Warning: Cancer And Reproductive Harm – Www.p65warnings.ca.gov
    • Connector Shape: Square
    • EGR (Exhaust Gas Recirculation) Valve Operation Type: Electronically Operated
    • Mounting Type: Bolted
    • Operation Type: Electrical
    • Package Contents: 1 Egr Valve, Gaskets
    • Terminal Quantity: 6
    • Terminal Type: Pin
    • Vacuum Port Quantity: 0
Brand: Dorman
Additional Fitment Information:
Vehicle
2008 - International 3200
Dorman
2011 International 3200 EGR Valve Dorman

P311-289D093    904-5056  New

1873842C92 , 1878918C1 , 1875808C1 , 1878918C2

Qty:
506.70
Dorman EGR Valve
  • ; 2007 EPA Standard Engine Desg. MaxxForce DT
  • Product Attributes:
    • California Proposition 65: Warning: Cancer And Reproductive Harm – Www.p65warnings.ca.gov
    • Connector Shape: Square
    • EGR (Exhaust Gas Recirculation) Valve Operation Type: Electronically Operated
    • Mounting Type: Bolted
    • Operation Type: Electrical
    • Package Contents: 1 Egr Valve, Gaskets
    • Terminal Quantity: 6
    • Terminal Type: Pin
    • Vacuum Port Quantity: 0
Brand: Dorman
Additional Fitment Information:
Vehicle
2011 - International 3200
Dorman
2010 International LoneStar EGR Valve Dorman

P311-08ABCA2    904-5057  New

4955969RX , 3683537 , 4955969NX

Qty:
608.45
Dorman EGR Valve
  • ; 2007 EPA Standard
  • Product Attributes:
    • California Proposition 65: Warning: Cancer And Reproductive Harm – Www.p65warnings.ca.gov
    • Connector Shape: Rectangular
    • EGR (Exhaust Gas Recirculation) Valve Operation Type: Electronically Operated
    • Mounting Hole Quantity: 5
    • Mounting Type: Bolted
    • Operation: Electrical
    • Operation Type: Electrical
    • Package Contents: 1 Egr Valve; 1 Gasket
    • Positive Or Negative Backpressure: Negative
    • Terminal Quantity: 6
    • Terminal Type: Blade
    • Vacuum Port Quantity: 0
Brand: Dorman
Additional Fitment Information:
Vehicle Engine Designation
2010 - International LoneStar ISX 15.0
Dorman
2009 International 9400i SBA EGR Valve Dorman

P311-08ABCA2    904-5057  New

4955969RX , 3683537 , 4955969NX

Qty:
608.45
Dorman EGR Valve
  • ; 2007 EPA Standard Engine Desg. ISX 15.0
  • Product Attributes:
    • California Proposition 65: Warning: Cancer And Reproductive Harm – Www.p65warnings.ca.gov
    • Connector Shape: Rectangular
    • EGR (Exhaust Gas Recirculation) Valve Operation Type: Electronically Operated
    • Mounting Hole Quantity: 5
    • Mounting Type: Bolted
    • Operation: Electrical
    • Operation Type: Electrical
    • Package Contents: 1 Egr Valve; 1 Gasket
    • Positive Or Negative Backpressure: Negative
    • Terminal Quantity: 6
    • Terminal Type: Blade
    • Vacuum Port Quantity: 0
Brand: Dorman
Additional Fitment Information:
Vehicle
2009 - International 9400i SBA
GBR Fuel Injection
2002 International 3200 EGR Valve 8 Cyl 6.0L GBR Fuel Injection - Reman EGR Valve

P311-2CE276B    522-021  New

Qty:
$55.00 103.80
GBR Fuel Injection EGR Valve
  • Reman Exhaust Gas Recirculation (EGR) Valve
  • Reman EGR Valve
  • Product Attributes:
    • Proposition 65: Warning: Cancer And Reproductive Harm - Www.p65warnings.ca.gov
  • An essential part of the emissions system, the EGR valve recirculates exhaust gases to be reburned which reduces combustion temperatures resulting in a reduction of oxides of nitrogen emissions. Failure of this component can result in check engine light and increased emissions. This cost-effective replacement EGR valve is remanufactured to meet or exceed OE performance specifications.
Brand: GBR Fuel Injection
Additional Fitment Information:
Vehicle Block Engine CID CC
2002 - International 3200 V 8 Cyl 6.0L 365 -
GBR Fuel Injection
2002 International 3200 EGR Valve 8 Cyl 6.0L GBR Fuel Injection - New EGR Valve

P311-1CA187B    522-019  New

Qty:
123.10
GBR Fuel Injection EGR Valve
  • Exhaust Gas Recirculation (EGR) Valve
  • New EGR Valve
  • Product Attributes:
    • Proposition 65: Warning: Cancer And Reproductive Harm - Www.p65warnings.ca.gov
  • An essential part of the emissions system, the EGR valve recirculates exhaust gasses to be reburned which reduces combustion temperatures resulting in a reduction of oxides of nitrogen emissions. Failure of this component can result in check engine light and increased emissions. New EGR valve is manufactured to meet or exceed OE performance specifications.
Brand: GBR Fuel Injection
Additional Fitment Information:
Vehicle Block Engine CID CC
2002 - International 3200 V 8 Cyl 6.0L 365 -
Standard Ignition
2009 International 4100 EGR Valve 8 Cyl 6.4L Standard Ignition

P311-114EBC9    EGV1151  New

4F2061 , 9C3Z 9D475-A , EGR4511 , 70-6342 , AP63456 , 8C3Z-9D475-C , V25-63-0060 , EGR19123 , 8C3Z 9D475-D , 8C3Z 9D475 B

Qty:
232.98
Standard Ignition EGR Valve
  • Exhaust Gas Recirculation Valve
  • Product Attributes:
    • Connector Gender: Female
    • Connector Shape: Oval
    • Digital/Mechanical: Electronic
    • Gaskets Included: Yes
    • Terminal Gender: Male
    • Terminal Quantity: 5
    • Terminal Type: Pin
  • Each Exhaust Gas Recirculation Valve is a direct-fit OE replacement that ensures ease of installation. High-quality materials withstand extreme conditions. Undergoes extensive testing to ensure reliability. As a global manufacturer of automotive aftermarket products, we maintain complete quality control throughout the manufacturing process.
Brand: Standard Ignition
Additional Fitment Information:
Vehicle Engine Designation Block Engine CID CC
2009 - International 4100 MaxxForce 7 V 8 Cyl 6.4L 389 6369

Latest Car Advice

CarJunky AutoAdvice

86 Mazda engine dying.

Showing 2 out of 6 Posts | Show 4 Hidden Posts
Question From nreves on 86 Mazda engine dying.

i have a 1986 mazda b2000 truck with a 2.0 engine and 5 spd transmission with 146k mi. the problem im having is when i come to stop or slow down really slow the rpms go way lower than normal (~500)/engine will sometimes die on me. when i start out to work in the morning its not bad or doesnt happen, but it gets worse the longer i drive it like when it gets warmed up something goes wrong. a previous problem that i had was it wouldnt start at all but replacing the ignition switch fixed that problem. i thought it might be the fuel filter so i bought one but am currently unable to find it on the truck to replace it. any help would be appreciated.

thanks

Response From Hammer Time

You may have a bad IAC ( idle air control) but try cleaning the throttle body first. Remove the intake snorkel, have someone hold the throttle wide open for you and scrub the back side of the throttle plate and surrounding bore with an old tooth brush and some carb cleaner. Be sure to spray some into the small holes next to the throttle plate. That should help stabilize the idle. If it still has a problem, replace the IAC.

Response From nreves

ok thanks, now the question is where can i find a picture or diagram that shows me where that is?

Response From Hammer Time Top Rated Answer

You know, I'm going to have to back up on that. Your engine is carbureted and I assumed it was fuel injected.

You may have something like a stuck EGR valve or just some internal carb problems. It's really going to have to be inspected.

Response From nreves

so would i be able to clean the egr valve and see it that does anything? a new one is pretty spendy.

Response From Hammer Time

Sure, just remove it and see if the pintle is fully seated. If it is, leave the vacuum hose off when you put it back on to see if anything changes.

1980 El Camino 4.4 ltr.... falter developed...

Showing 2 out of 12 Posts | Show 10 Hidden Posts
Question From akbolt on 1980 El Camino 4.4 ltr.... falter developed...

Thanks guys, here we go......... 1980 El Camino, 4.4 ltr...267 V-8..... 190,000 miles....... always runs great...new timing gears and chain 10,000 miles ago...... regular maintenence..... daily driver...... vehicle developed a "falter" a few weeks ago...... found bad gas in the tank, emptied as far as possible with a siphon attached to the supply pipe at the engine compartment, removed the carb and dumped out and cleaned....then rebuilt carb, very little carb wear, evidence of it being a replacement carb prior to my owenrship, (Rochester Dual-Jet)... no change....... new plugs, plug wires, rotor, cap, condensor harness, new fuel pump, new battery, new fuel filter, new choke pull off/ found old one leaking-replaced..... switched the ICM with an old one to see if there would be a change -negative........ lot's of time spent going over all of the vacuum lines, this "falter " doesn't occur till the engine warms up, then it's not a "full" falter.......rather like two or three plugs are switched off and turned back on again....... same on flats and hills.... we have hills around here at Hood Canal, Wash. state.............. distributor flyweight springs intact, vacuum advance diaphram works, could this be intermittent? This "falter" came on very slightly over 20 miles and stays at the current level now during testing and observation...... almost reminds me of a ignition switch going bad the way the car feels when running,,,,, "falter" occurs when warm just above idling when changing rpms and listening to engine with hood up....... thought cleaning the carb would clear out any passageway issues that affect the idle mixtures....... timing set at spec, idle air mixture jet seeming set properly........ got me and a paid mechanic scratching our heads....... next ideas....... fuel treatment if there's just a bit of crud left in the tank, ignition control module...... I always thought the gms usually just die completely unlike some others that act up before becoming unoperable....... hummmm???? thanks--- akbolt

Response From chickenhouse

All I can think of off hand is the throttle shaft that goes through the bottom of the carb. A replacement carb may not have had the throttle shaft re bushed, causing a slight leak in vacuum. Tried bumping the timing a couple of degrees?

Response From akbolt

Thanks chickenhouse, looking at and considering the throttleshaft wear just before installing the carb kit.... I didn't think it was worn "enough" to affect anything..... did not look rebushed, now that I think about it nor did any bushing/color difference stand out..... the shaft had such a slight amount of play, I didn't think it a factor.... guessing just a couple of thousands, if that, ...maybe that's enough ?....... I have advanced the timing from 4 btc, in the past to compensate for the old engine, to about 8 btc..... runs better but doesn't get rid of the "falter"....... have tried altering this multiple times during this process....to see and feel for any differences........ thanks.... now what?

Response From chickenhouse

Well, you say the vacuum advance diaphram is not leaking. Is it moving ok? Did you put a vacuum pump on it and verify the advance plate is moving? After that, all I got is in the carb.

Response From akbolt

That's my concern too...... I had pulled the hose and sucked on it to watch it move back and forth, but don't know how it works under pressure....steady or not......the flyweights are free and working. guess I need to get a tester...... The mechanic that I took it to said it(the vacuum advance) was ok and that he tested it with a vacuum tester....... probably a cheap and fragile part that needs to be replaced more often than a hundred thousand miles no matter what.......

Response From chickenhouse

Is it connected to ported or manifold vacuum?

Response From akbolt

I don't know my "ported" from "manifold" vacuum.......... the vacuum hose "Y's" about two inches from the diaphram. The larger hose/tube goes to and is attached to the carb base on the drivers side.... the other hose is attached to the "temperature sensor" located in the bottom of the air cleaner body/assembly to which also is another hose attached to the hot air valve "vacuum diaphram motor" located in the air cleaner "snorkel" which opens and closes with heat and warming up.....

Response From chickenhouse

Engine running at idle, if you take the hose off the advance, does it have vacuum? If so, that would be manifold vacuum. If none present, accelerate slightly and feel for vacuum. If it comes in then, that should be ported. Ported vacuum is above throttle plate, manifold comes off the intake.

Response From akbolt

Thanks, from the "looks' I'd say ported, but will test it first thing in the morn.......

Response From DanD Top Rated Answer

Just too jump in here with a suggestion; this running issue might have something to do with the EGR valve opening to early and or too much?
Back then they used either a ported EGR or a back pressure EGR; then there were two different styles of back pressure EGR valves; positive & negative.
A ported EGR valve will begin to open anytime there is more then 2” of ported vacuum applied to the valve and open fully after vacuum reaches approx 8” of vacuum.
A Back pressure valve also works within the same vacuum parameters but it also needs to feel exhaust back pressure on an internal valve with-in the EGR before it will begin to open.
The idea of the back pressure EGR is that a combination of engine vacuum and exhaust back pressure will regulate how much EGR should be applied. In other words slow down how fast it would open and how far it would open regardless of engine vacuum.

A ported EGR’s valve return spring would become weak or broken allowing the valve to open way too quickly and too far with a very small amount of vacuum applied.
The same with the back pressure valves; but they also had a problem with the small diameter tube inside the EGR would become plugged. This tube supplied exhaust back pressure to the EGR’s internal regulating valve. With it plugged the valve may not open at all or pop open at the slightest amount of vacuum applied.

When an EGR valve opens this way it causes the engine to go extremely lean during acceleration; which in turn could cause a hesitation/”falter”

Try un-plugging the EGR vacuum line and plug off the hose; now take it for a road test.

You can tell what type of valve that’s on your engine by the part number (if its not been changed with an after market) stamped on the valve.
If it’s a ported valve there will only be a part # something like 1704-----. If it’s a back pressure valve it’ll have a part number followed by a capital P for positive or an N for negative back pressure.

Sorry for the novel; but I wanted to explain so that if it was the problem you’d know why. This is if the intake is not plugged with carbon if so then none of the above would matter.

One last thought that I won’t go into (well not to far LOL); the camshafts were famous for wiping off individual lift lobes. I can’t remember the number of cams we replaced back then on the 4.4 and the 5lt engines; but it has to be in the hundreds and I’m just a small shop.
A quick test for that would be to remove the air cleaner, bring the engine up to temperature and then quickly crack the throttle wide open and closed. As the rpm begins to peak, you’ll hear a slight but rapid backfire coming from what sounds like deep inside the carb. Sounding something like a kids bike with a baseball card stuck in the spokes. If you hear that, pull the valve covers and confirm that all valves have somewhat the same amount of opening movement; if the cam’s gone it’ll be obvious.

Dan.

Response From akbolt

Oh Wow, thanks for all of the info....now, there's more to do of course. I'll get back to you on these issues...... I did take off the egr valve to inspect it and the passageways were clean and not loaded up like I've heard about happening..... the egr itself was not particularly working freely, but didn't seem too gummed up and I just put a few drops of liquid wrench on the shaft to dissolve some of the carbon and it free it up a little bit....... hope the cam isn't the culprit..... but if it is it is...... thanks for your input....back a little later---

Response From akbolt

El Camino Update---------- Wed. morning ....... plugged off the egr valve on both ends..... made a 5 mile test drive..... no faltering occurred. The egr valve is marked ---- AAY 1706 2416 ...so it looks like from your description that it is a "ported" valve...which when I just took it off again this morning to reinspect the crud amount in the manifold.... there's no other "small" diameter tube inside the egr.......... now that I think of it, it seems in the past that I've seen the exact same hoses plugged off on other persons egr valves...... guess they already knew the trick and what to do....... .......... is there any preference on purchasing egr valves other than the local NAPA store or auto parts suppliers, car junky ......... as to quality ?? Thanks DanD and chickenhouse...... will update should any change occur....... hope the cam lobes are good ones.......... fingers crossed..... this is a nice driving old El Camino......

99 Merc Cougar

Showing 2 out of 4 Posts | Show 2 Hidden Posts
Question From prop7515 on 99 Merc Cougar

99 Cougar 2.5L codes p0171 & po174 checked for vacuum leaks at intake manifold, none present. Any ideas? Any known problems that would give these codes?

Response From way2old

Also check the Mass Air Flow sensor. If the hot wire is dirty, it will give a false air intake reading and cause the PCM to over compensate the fuel mixture. It is easily cleaned. Just be careful not to damage the wires inside. They are very fragile. Do as DanD suggested first. Then look at the MAF. There is a hertz reading that tells the vehicle the altitude. You will also need a scan tool capable of reading PIDS to access this information. Good luck.

Sorry, did not look at the original post date.

Response From Tom Greenleaf

Don't worry about how old a post is. Folks are surfing for info that we never hear about and get the answers they need. It really helps when people post the make of the car on the subject line for others to find. T

Response From DanD Top Rated Answer

With both these codes relating to both banks being lean and the adaptive fuel trim has reached it’s limits in trying to richen up the mixture. It has to be something that is common to all cylinders. Like you mentioned a vacuum leak, stuck EGR valve, low fuel pressure and the list goes on. It could be an internal vacuum leak as in the intake manifold gasket is sucked out and is drawing vacuum from the crankcase. Fords use to be bad for the power brake booster having internal vacuum leaks.
How does the car run?
It’s not likely both banks 1 and 2, O2 sensors have gone dead but you never know whether something has contaminated your fuel to kill both sensors.
I don’t know if you have access to a scan tool, which would be the easiest way to monitor O2 activity, if not a digital voltmeter will work. By back probing the signal return wire of the sensors one at a time and see what the sensors are doing. Cause a lean condition by pulling off a large vacuum line or a rich condition by restricting incoming air at the breather; see if the O2 react to these changes you’ve forced the engine to go to. The voltages should swing from .1 to about .9 of a volt; .9 is a lean indication and the computer should be dumping fuel to compensate and .1 of a volt is a rich indication and the computer should be pulling fuel away to lean the engine out. If everything is “normal” the voltage should be toggling above and the below .450 volts.
I believe the white wire on the right bank O2 connector is signal return and the white/red wire on the left bank. These are the O2’s that are in the manifolds. I use something like a paper clip or safety pin the back probe the wire connector. Carefully slide the probe up the back of the connector beside the wire until you touch the metal terminal inside the connector. Then hook up the voltmeter to the probe and a known good ground.
Dan.

1999 Pontiac Grand Prix GTP dying, no trouble codes

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Question From deftoneslmc on 1999 Pontiac Grand Prix GTP dying, no trouble codes

1999 Pontiac Grand Prix GTP 3.6L Supercharged 250,000 miles

Car starts fine and idles but will chug and sometimes dies when up to speed. Ran the diagnostic tool and it pulled up no trouble codes. Replaced the fuel pump and filter and this did not help. If I keep on the gas it keeps it from dying but then will die when I slow down or stop. If I wait a few minutes it will start right back up but will have the same issues when I get up to speed. Any idea where my issue could be?

Response From Loren Champlain Sr Top Rated Answer

defton; I'm assuming since there are no DTCs that you also don't have a CEL or SES lamp illuminated? Since you can keep it running by feathering the throttle, that would eliminate ignition problems. One that comes to mind would be excessive back pressure (plugged catalyst), but generally won't affect it at idle speeds. Could be more than one thing going on, here. Catalytic converters can break up, internally. You may want to take a rubber mallet, or your fist, and smack the cat to hear if there is anything loose inside. Sometimes, a chunk can break off, plug the exhaust end, and cause a severe loss of power. You'll stop, the chunk will fall away, and be good to go again. Fairly rare, but possible.
Even though you've already replaced the fuel pump, pressure readings would be helpful. You did replace the filter, right? This engine probably uses a digital type EGR valve, but can stick open causing the symptoms of a massive vacuum leak. Unlikely, but again possible.

Response From deftoneslmc

Not sure which pressure readings you need as I am not completely sure what I am looking at on the diagnostic tool. I did get these readings though, don't know if they help or not.

Tank Pressure (V) 1.47
Tank Pressure (mmHg) -1.60
Evap Purge 15%
Evap Vent Sol Off

If you need any other readings let me know which ones would help.

I also found that if I rev it up in idle it starts to chug around 3000 rpm and above and then dies afterwards. Sometimes instead of dying right away it will drop and rise in rpm quickly and then eventually die.

Response From Loren Champlain Sr

defton; Actually, I was looking for fuel pressures.

Response From deftoneslmc

Like I said I'm unsure what I'm looking at in the diagnostic tool.
I'm using a the Snap-On Solus so if you have any experience with that, letting me know what I need to get would definitely help. Thanks.

Response From Double J

Common on these models is the failure of the fuel pump resistor.
Worth looking into...Just a thought!

Click here....

Click Here....

Response From Guest

im reading the fuel pump resistor, and im wondering if that is my ptoblem too. i have a 99 gtp. it doesnt stall out yet, but it will lose power, breaking up and then kick back on. my rpm's r going from 3000 to 0 and right back up. ive already tried new plugs wires, even changed the module. just sinking money in it and no mechanic can figure it out. does this sound like the same problem? i have a race in 2 weeks so i have to get it back on the road. thx

Response From Loren Champlain Sr

Jim; That's news to me! Thanks. Of course, if we run into it, I'll have forgotten. Great post!

s-10 flooding enough for gas in oil

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Question From boazconstrictor on s-10 flooding enough for gas in oil

Chevy S-10 1995, 260+ thousand miles, 4.3 with throttle body injection. We have replaced fuel pump, computer without the PCM. It will idle with the throttle wide open but not at the start. The spark plugs get carboned within seconds. We have checked the coil,IAC,TBS, Fuel pressure is at 12lbs with key on. All wires ohm correctly. New cap and rotor. Compression is an even 125-130lbs in all cylinders. To use a scanner it has the OBDII and is a vector motor. It is almost like parts are from different years in the same car. It still will not idle help me please

Response From re-tired


To use a scanner it has the OBDII and is a vector motor. It is almost like parts are from different years in the same car. It still will not idle help me please
I was going on the presumption that he was confused which eng he had . He stated that he had a "vector" motor which could have been a mispelling of "vortec" many people confuse the throttle intake butterfly with a throttlebody. This is why I asked if it was a "W" motor. Your input is always welcome. RT

Response From Sidom

Yup........ I see that now...... Does make for confusing info....

Something tells me, we are never gonna know the answer to this one.......

Response From Sidom

Have you pulled codes yet.... If so post them here.

Hopefully your scanner can see a datastream. Take a quick look at the air & coolant temps (ECT & IAT) and see that they are showing. Also see how the long the injector pulse width is.

I'm guessing the "comp w/o the PCM" is the ign control module?

Response From re-tired Top Rated Answer

The problem is common with all the GM vehicles made between 1992 - 1995, that have the 4.3L Vortec vin code "W". The 4.3L Vortec has a CPI (Central Port Injection) system that has proven to be quite problematic. These injection systems consist of a large fuel injector that has tube going to each cylinder (six total). This injector is located in the plenum. (must remove upper intake to see it) The problem with these systems is that they develop leaks, these leaks occur in either the FPR (fuel pressure regulator) mounted on the side of the injector or the internal fuel lines leading to the injector assembly The FPR is located on the passenger side half of the intake. The cylinders on the side that develops the leak, get flooded by fuel causing a rich condition. This rich condition can cause the engine to run rough, create a strong smell of raw fuel, set O2 sensor codes, cause excessive carbon build up that plugs the EGR valve, set EGR codes, and/or cause raw fuel to enter the oil which destroys the engine.

Response From Sidom

I believe he mentioned this was a TBI system...... But all that does hold true for the CPI systems....