Finish Selecting Your Vehicle to Shop For Your Oxygen Sensor

Choose a Year for your Plymouth 's Oxygen Sensor

  • 2001
  • 2000
  • 1999
  • 1998
  • 1997
  • 1996
  • 1995
  • 1994
  • 1993
  • 1992
  • 1991
  • 1990
  • 1989
  • 1988
  • 1987
  • 1986
  • 1985
  • 1984
  • 1983
  • 1982
  • 1981
  • 1980
  • 1979

Shop By Brand

The Following brands are available based on your search.

  • Bosch
    Bosch
  • Delphi
    Delphi
  • Denso
    Denso
  • Mopar
    Mopar
  • NGK
    NGK
  • Spectra
    Spectra
  • Standard Ignition
    Standard Ignition
  • Walker
    Walker

Best Selling Genuine Plymouth Oxygen Sensors

  • We Stock the following top leading brands, including Delphi, Denso
  • Constantly Updated Inventory of Plymouth Replacement Oxygen Sensor Parts

We stock Oxygen Sensor parts for most Plymouth models, including Acclaim, Arrow, Arrow Pickup, Breeze, Caravelle, Colt, Gran Fury, Grand Voyager, Horizon, Laser, Neon, PB100, PB150, PB200, PB250, PB300, PB350, Prowler, Reliant, Sapporo, Scamp, Sundance, Trailduster, Turismo, Volare, Voyager.

Delphi
1996 Plymouth Grand Voyager Oxygen Sensor Delphi

P311-5B246E5    New

Qty:
$50.16
Delphi Oxygen Sensor
  • with Transitional Low Emissions Vehicle (TLEV), and

    with 36" Pigtail Connector
Brand: Delphi
This Product is Eligible for Free Ground Shipping
Additional Fitment Information:
Vehicle
1996 - Plymouth Grand Voyager
Delphi
1996 Plymouth Voyager Oxygen Sensor Delphi

P311-5B246E5    New

Qty:
$50.16
Delphi Oxygen Sensor
Brand: Delphi
This Product is Eligible for Free Ground Shipping
Additional Fitment Information:
Vehicle
1996 - Plymouth Voyager
Denso
Qty:
$34.69
Denso Oxygen Sensor  Upstream
  • 4 Wire, Direct Fit, Heated, Wire Length: 14.37
  • OE Style
  • DENSO oxygen sensors are manufactured and tested to the strictest OE standards for unparalleled peformance; Each component is precision built for exact replacement, and a first time fit; This innovative line features DENSO's exclusive aluminum oxide trap layer, designed to protect the ceramic element from silicone and lead posining for improved engine performance, greater fuel efficiency, and unparalleled longevity; DENSO gives you the right part and the right fit, the first time.
Brand: Denso
Additional Fitment Information:
Vehicle Block CC CID Position
2000 - Plymouth Prowler V 3497 215 Upstream
Denso
Qty:
$34.69
Denso Oxygen Sensor  Downstream
  • 4 Wire, Direct Fit, Heated, Wire Length: 14.37
  • OE Style
  • DENSO oxygen sensors are manufactured and tested to the strictest OE standards for unparalleled peformance; Each component is precision built for exact replacement, and a first time fit; This innovative line features DENSO's exclusive aluminum oxide trap layer, designed to protect the ceramic element from silicone and lead posining for improved engine performance, greater fuel efficiency, and unparalleled longevity; DENSO gives you the right part and the right fit, the first time.
Brand: Denso
Additional Fitment Information:
Vehicle Block CC CID Position
1997 - Plymouth Prowler V 3497 215 Downstream
Denso
Qty:
$34.69
Denso Oxygen Sensor  Upstream
  • 4 Wire, Direct Fit, Heated, Wire Length: 14.37
  • OE Style
  • DENSO oxygen sensors are manufactured and tested to the strictest OE standards for unparalleled peformance; Each component is precision built for exact replacement, and a first time fit; This innovative line features DENSO's exclusive aluminum oxide trap layer, designed to protect the ceramic element from silicone and lead posining for improved engine performance, greater fuel efficiency, and unparalleled longevity; DENSO gives you the right part and the right fit, the first time.
Brand: Denso
Additional Fitment Information:
Vehicle Block CC CID Position
1998 - Plymouth Breeze L 1996 122 Upstream
Denso
Qty:
$34.69
Denso Oxygen Sensor  Downstream
  • 4 Wire, Direct Fit, Heated, Wire Length: 14.37
  • OE Style
  • DENSO oxygen sensors are manufactured and tested to the strictest OE standards for unparalleled peformance; Each component is precision built for exact replacement, and a first time fit; This innovative line features DENSO's exclusive aluminum oxide trap layer, designed to protect the ceramic element from silicone and lead posining for improved engine performance, greater fuel efficiency, and unparalleled longevity; DENSO gives you the right part and the right fit, the first time.
Brand: Denso
Additional Fitment Information:
Vehicle Block CC CID Position
2000 - Plymouth Neon L 1996 122 Downstream
Denso
Qty:
$34.69
Denso Oxygen Sensor  Upstream
  • 4 Wire, Direct Fit, Heated, Wire Length: 14.37
  • O.E. Quality Replacement Sensor
  • OE Style
  • DENSO oxygen sensors are manufactured and tested to the strictest OE standards for unparalleled peformance; Each component is precision built for exact replacement, and a first time fit; This innovative line features DENSO's exclusive aluminum oxide trap layer, designed to protect the ceramic element from silicone and lead posining for improved engine performance, greater fuel efficiency, and unparalleled longevity; DENSO gives you the right part and the right fit, the first time.
Brand: Denso
Additional Fitment Information:
Vehicle Block CC CID Position
2000 - Plymouth Prowler V 3497 215 Upstream
Denso
Qty:
$34.69
Denso Oxygen Sensor  Downstream
  • 4 Wire, Direct Fit, Heated, Wire Length: 14.37
  • O.E. Quality Replacement Sensor
  • OE Style
  • DENSO oxygen sensors are manufactured and tested to the strictest OE standards for unparalleled peformance; Each component is precision built for exact replacement, and a first time fit; This innovative line features DENSO's exclusive aluminum oxide trap layer, designed to protect the ceramic element from silicone and lead posining for improved engine performance, greater fuel efficiency, and unparalleled longevity; DENSO gives you the right part and the right fit, the first time.
Brand: Denso
Additional Fitment Information:
Vehicle Block CC CID Position
1997 - Plymouth Prowler V 3497 215 Downstream
Denso
Qty:
$34.69
Denso Oxygen Sensor  Upstream
  • 4 Wire, Direct Fit, Heated, Wire Length: 14.37
  • O.E. Quality Replacement Sensor
  • OE Style
  • DENSO oxygen sensors are manufactured and tested to the strictest OE standards for unparalleled peformance; Each component is precision built for exact replacement, and a first time fit; This innovative line features DENSO's exclusive aluminum oxide trap layer, designed to protect the ceramic element from silicone and lead posining for improved engine performance, greater fuel efficiency, and unparalleled longevity; DENSO gives you the right part and the right fit, the first time.
Brand: Denso
Additional Fitment Information:
Vehicle Block CC CID Position
1998 - Plymouth Breeze L 1996 122 Upstream
Denso
Qty:
$34.69
Denso Oxygen Sensor  Downstream
  • 4 Wire, Direct Fit, Heated, Wire Length: 14.37
  • Calif. O.E. Quality Replacement Sensor
  • OE Style
  • DENSO oxygen sensors are manufactured and tested to the strictest OE standards for unparalleled peformance; Each component is precision built for exact replacement, and a first time fit; This innovative line features DENSO's exclusive aluminum oxide trap layer, designed to protect the ceramic element from silicone and lead posining for improved engine performance, greater fuel efficiency, and unparalleled longevity; DENSO gives you the right part and the right fit, the first time.
Brand: Denso
Additional Fitment Information:
Vehicle Block CC CID Position
2001 - Plymouth Neon L 1996 122 Downstream
Denso
Qty:
$34.69
Denso Oxygen Sensor  Downstream
  • 4 Wire, Direct Fit, Heated, Wire Length: 14.37
  • ULEV O.E. Quality Replacement Sensor
  • OE Style
  • DENSO oxygen sensors are manufactured and tested to the strictest OE standards for unparalleled peformance; Each component is precision built for exact replacement, and a first time fit; This innovative line features DENSO's exclusive aluminum oxide trap layer, designed to protect the ceramic element from silicone and lead posining for improved engine performance, greater fuel efficiency, and unparalleled longevity; DENSO gives you the right part and the right fit, the first time.
Brand: Denso
Additional Fitment Information:
Vehicle Block CC CID Position
2000 - Plymouth Neon L 1996 122 Downstream
Denso
Qty:
$34.69
Denso Oxygen Sensor  Upstream
  • 4 Wire, Direct Fit, Heated, Wire Length: 14.37
  • O.E. Quality Replacement Sensor 2 Required
  • OE Style
  • DENSO oxygen sensors are manufactured and tested to the strictest OE standards for unparalleled peformance; Each component is precision built for exact replacement, and a first time fit; This innovative line features DENSO's exclusive aluminum oxide trap layer, designed to protect the ceramic element from silicone and lead posining for improved engine performance, greater fuel efficiency, and unparalleled longevity; DENSO gives you the right part and the right fit, the first time.
Brand: Denso
Additional Fitment Information:
Vehicle Block CC CID Position
2000 - Plymouth Prowler V 3497 215 Upstream
Denso
Qty:
$34.69
Denso Oxygen Sensor  Downstream
  • 4 Wire, Direct Fit, Heated, Wire Length: 14.37
  • O.E. Quality Replacement Sensor 2 Required
  • OE Style
  • DENSO oxygen sensors are manufactured and tested to the strictest OE standards for unparalleled peformance; Each component is precision built for exact replacement, and a first time fit; This innovative line features DENSO's exclusive aluminum oxide trap layer, designed to protect the ceramic element from silicone and lead posining for improved engine performance, greater fuel efficiency, and unparalleled longevity; DENSO gives you the right part and the right fit, the first time.
Brand: Denso
Additional Fitment Information:
Vehicle Block CC CID Position
1997 - Plymouth Prowler V 3497 215 Downstream
Denso
Qty:
$34.69
Denso Oxygen Sensor  Downstream
  • 4 Wire, Direct Fit, Heated, Wire Length: 14.37
  • O.E. Quality Replacement Sensor ULEV
  • OE Style
  • DENSO oxygen sensors are manufactured and tested to the strictest OE standards for unparalleled peformance; Each component is precision built for exact replacement, and a first time fit; This innovative line features DENSO's exclusive aluminum oxide trap layer, designed to protect the ceramic element from silicone and lead posining for improved engine performance, greater fuel efficiency, and unparalleled longevity; DENSO gives you the right part and the right fit, the first time.
Brand: Denso
Additional Fitment Information:
Vehicle Block CC CID Position
2000 - Plymouth Neon L 1996 122 Downstream
Denso
Qty:
$34.69
Denso Oxygen Sensor  Downstream
  • 4 Wire, Direct Fit, Heated, Wire Length: 14.37
  • O.E. Quality Replacement Sensor Calif.
  • OE Style
  • DENSO oxygen sensors are manufactured and tested to the strictest OE standards for unparalleled peformance; Each component is precision built for exact replacement, and a first time fit; This innovative line features DENSO's exclusive aluminum oxide trap layer, designed to protect the ceramic element from silicone and lead posining for improved engine performance, greater fuel efficiency, and unparalleled longevity; DENSO gives you the right part and the right fit, the first time.
Brand: Denso
Additional Fitment Information:
Vehicle Block CC CID Position
2001 - Plymouth Neon L 1996 122 Downstream
Denso
Qty:
$28.00
Denso Oxygen Sensor  Upstream
  • 4 Wire, Direct Fit, Heated, Wire Length: 12.99
  • OE Style
  • DENSO oxygen sensors are manufactured and tested to the strictest OE standards for unparalleled peformance; Each component is precision built for exact replacement, and a first time fit; This innovative line features DENSO's exclusive aluminum oxide trap layer, designed to protect the ceramic element from silicone and lead posining for improved engine performance, greater fuel efficiency, and unparalleled longevity; DENSO gives you the right part and the right fit, the first time.
Brand: Denso
Additional Fitment Information:
Vehicle Block CC CID Position
1997 - Plymouth Breeze L 2429 148 Upstream
Denso
Qty:
$28.00
Denso Oxygen Sensor  Upstream
  • 4 Wire, Direct Fit, Heated, Wire Length: 12.99
  • OE Style
  • DENSO oxygen sensors are manufactured and tested to the strictest OE standards for unparalleled peformance; Each component is precision built for exact replacement, and a first time fit; This innovative line features DENSO's exclusive aluminum oxide trap layer, designed to protect the ceramic element from silicone and lead posining for improved engine performance, greater fuel efficiency, and unparalleled longevity; DENSO gives you the right part and the right fit, the first time.
Brand: Denso
Additional Fitment Information:
Vehicle Block CC CID Position
1997 - Plymouth Prowler V 3497 215 Upstream
Denso
Qty:
$28.00
Denso Oxygen Sensor  Upstream
  • 4 Wire, Direct Fit, Heated, Wire Length: 12.99
  • O.E. Quality Replacement Sensor
  • OE Style
  • DENSO oxygen sensors are manufactured and tested to the strictest OE standards for unparalleled peformance; Each component is precision built for exact replacement, and a first time fit; This innovative line features DENSO's exclusive aluminum oxide trap layer, designed to protect the ceramic element from silicone and lead posining for improved engine performance, greater fuel efficiency, and unparalleled longevity; DENSO gives you the right part and the right fit, the first time.
Brand: Denso
Additional Fitment Information:
Vehicle Block CC CID Position
1997 - Plymouth Breeze L 2429 148 Upstream
Denso
Qty:
$28.00
Denso Oxygen Sensor  Upstream
  • 4 Wire, Direct Fit, Heated, Wire Length: 12.99
  • O.E. Quality Replacement Sensor
  • OE Style
  • DENSO oxygen sensors are manufactured and tested to the strictest OE standards for unparalleled peformance; Each component is precision built for exact replacement, and a first time fit; This innovative line features DENSO's exclusive aluminum oxide trap layer, designed to protect the ceramic element from silicone and lead posining for improved engine performance, greater fuel efficiency, and unparalleled longevity; DENSO gives you the right part and the right fit, the first time.
Brand: Denso
Additional Fitment Information:
Vehicle Block CC CID Position
1997 - Plymouth Prowler V 3497 215 Upstream
Denso
Qty:
$28.00
Denso Oxygen Sensor  Upstream
  • 4 Wire, Direct Fit, Heated, Wire Length: 12.99
  • Excludes TLEV O.E. Quality Replacement Sensor
  • OE Style
  • DENSO oxygen sensors are manufactured and tested to the strictest OE standards for unparalleled peformance; Each component is precision built for exact replacement, and a first time fit; This innovative line features DENSO's exclusive aluminum oxide trap layer, designed to protect the ceramic element from silicone and lead posining for improved engine performance, greater fuel efficiency, and unparalleled longevity; DENSO gives you the right part and the right fit, the first time.
Brand: Denso
Additional Fitment Information:
Vehicle Block CC CID Position
1996 - Plymouth Grand Voyager V 3301 201 Upstream

Latest Plymouth Repair and Oxygen Sensor Installation Advice

CarJunky AutoAdvice

Tune Up Time

Showing 2 out of 2 Posts
Question From kingjim9 on Tune Up Time

1994 Plymouth Acclaim 2.5l 4cyl. It's starting to idle a little rough so i figured its time for a tune up, plus with the cost of gas it can't hurt right? I was going to be replacing the plugs, wires, air filter, and pcv valve. Anything else you guys would recommend replacing?

Response From Double J Top Rated Answer

Fuel filter
Breather filter
Distributor cap and rotor.
Oxygen sensor is not a bad idea,a little pricy tho.
Another not a bad idea type thing is the pick up coil in the distributor,not normally replaced with a maintenance tune up


Jim

plymouth breeze random stalling then won't start

Showing 2 out of 2 Posts
Question From Guest on plymouth breeze random stalling then won't start



I have a 1998 Plymouth Breeze 2.0 it was running great then all of the sudden it starting sputtering then shut off, it wouldn't start and i had it towed home and then it staring no problem. I a have ran it a few times since without a problem then tonight it did the same thing. Could it be the fuel pump or possibly the oxygen sensor. Any ideas?????????

I can be reached by email @ p.lee@earthlink.net

Response From steve01832 Top Rated Answer

It could be a number of things. When the vehicle doesn't start is the only time you can diagnose it. You will need to hook up a fuel pressure guage, install a spark tester, and install a noid light into one of the injector connectors. Crank the engine over and see which system(s) is not working. Then post back with the results including the fuel pressure in psi and we can go further.

Steve

oxygen sensors

Showing 2 out of 7 Posts | Show 5 Hidden Posts
Question From scottie54 on oxygen sensors

I recently had to replace my speed sensor on my 1998 mercury V-6 sable and that took care of the speedometer and the transmission not shifting problem.Unfortunately I damage the wires on the top oxygen sensor firewall side and I had to replace it.Everything work fine for 4 days then the service light came on and a code PO135 O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 1) and I think that is the same one I replaced.That sensor is next to the speed sensor and there is no room at all and when you are fighting installing that y-pipe exhaust it is very difficult not to nick those wires.My questions are:Is Bank 1 Sensor 1 the top sensor on the firewall side? Is there a way to check the wiring at the plug with my fluke meter?Also has anybody have any experience replacing that type of close fitting O2 sensor,I would like to see if there a easier and safe way to do this with out pulling of that stupid y-pipe and possibly nicking the wires again?

Response From tcwagner Top Rated Answer

Dear O2,
Sad to say, there is a failure rate on O2 sensors. I had a quality one (from Napa) put in and it failed 100 miles later. They made it good, but I was in the middle of nowhere in WV mtns. when it went again. Yeah. You may not have nicked the wire, it could have just failed. I don't know if it would help on your model, but an experienced Plymouth mechanic told me that if you floor it and it runs fine, it is probably not the o2 sensor, since the computer ignores it under full acceleration. Maybe Jim could tell you more. He is a helpful guy for sure.
Terry

Response From dmac0923

bank 1 i believe is the drivers side. so bank 1 sensor 1 would be on the drivers side in between the exhaust manifold and cat converter

Response From scottie54

Thanks for your reply dmac0923,and I agree bank 1 sensor 1 is the top sensor but I have a DOHC V-6 and someone else said it was the firewall side but I'm not sure.

Response From Double J

Bank 1 is the bank that contains the number 1 cylinder,sensor 1 is the sensor before the cat/con.
I believe the #1 cylinder is the bank closest to the firewall on this model.

Response From way2old

Very good Jim.


Response From Double J

THANK YOU


98 Ply Breeze dies when coming to a stop with ac on

Showing 3 out of 3 Posts
Question From megathia on 98 Ply Breeze dies when coming to a stop with ac on

Hi! My 98 Plymouth Breeze (156,000 miles) has been acting up ever since I started running the air conditioner about a month ago. When the a/c is on and I am coming to a stop (either in traffic or at a stoplight), the engine shakes violently and dies if I don't immediately turn off the air conditioner. If it dies, I can turn off the air and restart the car, and then it runs. Doesn't have this problem when the air conditioning is off and I just have the fan on. I'm taking it into the shop tomorrow, just wondering what to expect in terms of what it will need. Cracked exhaust system manifold, busted oxygen sensor, and timing chain were replaced two months ago (and those repairs cost more than the car is worth!). Air conditioner is definitely needed, as I live in St. Louis, it's getting hot, and I have a 90 mile daily commute! Any insight anyone can provide would be much appreciated! Thank you!

Response From dave284

It could be an IAC valve,need to have the computer checked for trouble codes, other than that the compressor or the clutch could be locking up, but a shop would have the tools for kind of diagnosing.

Response From megathia Top Rated Answer

Thanks for the advice... unfortunately the shop couldn't find anything wrong with the car's computer, and it wasn't shuddering or dying when the mechanics drove it, so they have no idea what is wrong.

It shuddered a little when I drove it home, but didn't die. We'll see what happens in the next few days - I may be posting again!

1994 Plymouth Voyager 3.0 175k Miles

Showing 2 out of 11 Posts | Show 9 Hidden Posts
Question From alger25 on 1994 Plymouth Voyager 3.0 175k Miles

Hello,

My wife and I acquired a 94 Plymouth Voyager that has a 3.0 Liter in it. At first, the current owner told me that the transmission needed replaced and that the ignition module??? was bad.

As I always like to do when getting a vehicle, I changed the spark plugs, fuel filter, transmission filter, and oil filter. The transmission oil looked real dirty but there was no abnormal build up on the magnet in the pan. The van will start up and idle perfect. I was curious to see how the transmission was so I took it down the road a ways and it ran fine, no jerky shifting or any abnormalities.

Here is the problem.....I was told that after the van has been driven for awhile, it will shut off completely...Not stall, but cut out. The current owners said they needed to pull off to the side of the road and wait a few minutes and it would then drive fine for awhile again. The next problem that I have is that when I start the van up and give it gas, it chugs...sometimes to the point of stalling out, others it works out the problem and revs fine. This problem is random, it doesn't always do this. When I took the van on a little test drive, I noticed that if I pushed the gas pedal to the floor, the rpm's would jump maybe 100-200 and the van would act like it was getting no power, it would not accelerate at all. This only happens at full throttle, if I accelerate up a hill at half throttle, it would accelerate perfect.

I noticed that the van was missing its gas cap off the tank. I decided to see what putting one back on would do.....well, it started up and idled fine, but when I gave it any pedal at all it would stall out to the point of not starting again until I let it sit for a good 10-15 minutes.

I am really at a loss on this vehicle and don't want to sink a ton of money into a money pit as finances are tight right now.

I would just take it to a service center and have them find out what is wrong with it, but the location is an hour out of town and I am not going to register/insure the van until I know that it is running solid.

I've asked around and everyone is stumped as to what the primary problem could be. I have been leaning towards the fuel pump but really hate to sink money into a part not knowing if the problem will be fixed or still occur.

Any help/suggestions are greatly appreciated. I look forward to hearing some opinions on this matter :)

Response From Loren Champlain Sr

alger; The very first thing I'd check, would be the fuel filter. Second, fuel pressure. Have the trouble codes retrieved (if any) and post them for us to see. A faulty TPS (throttle position sensor) can cause similar symptoms.

Response From alger25

Loren,

I changed the fuel filter while i was tuning up the van last weekend thinking that may be part of this issue. Nothing changed after the tuneup was completed so the filter is not the cause.

How do I check the fuel pressure? As I stated in my first post, the vehicle is in a bad location and would require driving it an hour into town on a freeway. (Only one road to the location from here) I was leaning towards risking the drive into town to take the van to auto zone to have a scanner hooked up to get the codes but its a pretty risky drive. I live in town and am not able to have non-running/insured/registered vehicles sitting outside the house....I am kind of in a difficult situation here :(

Thanks for the advice though, I'll keep chugging along and hope to figure something out without having to risk the drive into town.

EDIT: Also would like to add that the AIRBAG light in the dashboard stays lit up all the time the key is on, maybe this will help out, maybe not!

Response From Loren Champlain Sr

alger; A fuel pressure guage can be rented (or borrowed) from some of the major parts stores. Since this is an OBDI system, you'll, more than likely, have to pay a shop to 'pull' codes. The 'major' parts stores can only do OBDII systems. The air bag light won't have anything to do with the drivablility issues. Just means that the air bag won't deploy.

Response From alger25

If I rent a fuel pressure gauge from auto zone, what am i suppose to be looking for exactly? And what are we ruling out by checking the fuel pressure?

From my automotive experience, just the fact that the van runs even more terrible by placing the gas cap on the tank would direct me towards the fuel pump, however, the full pedal acceleration makes no sense because it accelerates just fine with half a pedal.

Response From Loren Champlain Sr

alger; The fuel pressure should be 48 psi. at idle. Also, wouldn't hurt to do a backpressure test on the exhaust system.

Response From alger25

If you had to make an educated guess, what would be the first part you would replace concerning the problem with this van? We are headed out to look at it again tomorrow and I really want to start narrowing things down so that we can get it running again. I am unable to get it into town to have a scan pulled from it or any of the tests you mentioned.

I am leaning towards the fuel pump...That would explain the sputtering with little gas pedal after idle and the fact that when at full throttle it has no power. However, it kinda of seems wierd that with half gas pedal, it accelerates fine.

EDIT: I found a pressure tester I can rent for 150.00 so it looks like we will be doing that tomorrow. If the pressure test doesnt meet 48 psi at idle, what would be the cause of this? Just curious what part would be failing so that I can pick that part up as well so I will have it in the event it needs replaced or I can return it in the event it doesnt.

Response From Loren Champlain Sr Top Rated Answer

alger; I can understand the dilema that you are, but without testing, I can't advocate replacing anything, yet. From the symptoms, I'd want to check exhaust backpressure and fuel pressure before doing anything. The fuel pump is a spendy item...you want to be 100% sure it's the problem before replacing it. You can remove the upstream oxygen sensor and see how it runs...It's going to be noisy, but should answer the backpressure question. Hot exhaust will come out of that hole, so take every precaution that nothing will get damaged or caught on fire during the test. (I don't recommend a novice attempt this) I sure hope that the rental on that pressure tester isn't $150.00....just a deposit? Right?

Response From alger25

The 150.00 is a deposit for the item, I will get a full refund when I take the kit back to them. If I remove the o2 sensor and see what it does would that eliminate that part? Also, how do I go about doing a back pressure test? I just really want to get this taken care of.

Also, you suggested getting the codes pulled off the computer but as far as I am aware, there are no codes. The check engine light has not come on a single time since I have started the van up over a month or two ago.

Like I said before, the idle is awesome, the acceleration at half gas pedal is very responsive.

I will rent that kit tomorrow to test the fuel pressure and also remove the O2 sensor to see if that changes anything....If I remove the O2 sensor to see how it acts, I would assume it wont run top notch due to the sensor not being in place or am I mistaken?

Response From Loren Champlain Sr

Alger; We use a fitting that screws into the hole that the O2 sensor comes out of. Then, connect a pressure guage to the fitting, and can get an accurate pressure reading. Anything above 2psi is a problem. The check engine light on pre-96 cars won't come on unless there is a hard fault. Meaning, you could have stored codes that will help in the diagnostics. Assuming that the CEL works. When the key is turned to the 'on' position, the CEL should illuminate. By removing the O2 sensor and running it around the block to check for power, might cause a CEL, or set a code. (leave the sensor connected, electrically). It will more than likely run rich, but we're more concerned, right now, if your 'power' is back to normal.
Do you already own this vehicle, or are you 'thinking' of buying it. If you haven't bought it already, I'd run away. Fast.

Response From alger25

We own it, my wife's uncle gave it to us since he has no use for it and we need a vehicle.