Question about 1998 Chevrolet Cavalier

1 Answer

98 Cavalier 2.4L engine stumbles at 2000-2500 rpm

The car stumbles and misses at 2000-2500 rpm but takes off if the accelerator is floored. I have changed the coil pack, plugs, all sensors on the injection system, fuel filter, forward O2 sensor. The engine runs great with the front O2 sensor unplugged, but gas mileage is poor. MIL sets a lean mixture code.

Posted by on

  • Anonymous Jan 08, 2009

    I had the wiring harness traced when I had it in for the original diagnosis. After a $300 bill they could only speculate on a host of other thigs to try. I can do that myself. I don't need to run up the bill further. I haven't fixed the problem yet. I am living with the O2 sensor unplugged. It runs fine and with gas back under $2 it's not such an issue. I may try an OEM O2 sensor when I can afford it ($80 vs $20). I am afraid it is the PCM as my Speedo is not working now either.

  • Anonymous Jan 12, 2009

    Thanks for the suggestions.

    My Speedo is electronic (no cable) so I am going to try swapping the cluster. I know this will be a pain with the passlcok code reprogramming but I haven't got any other ideas.

    I will check the condition of the hoses for pluging or cracks. Thanks for the helpful hints.

×

Ad

1 Answer

  • Level 1:

    An expert who has achieved level 1.

    MVP:

    An expert that got 5 achievements.

    Habit-Forming:

    Visited the website for 3 consecutive days.

    Hot-Shot:

    An expert who has answered 20 questions.

  • Contributor
  • 35 Answers

Could be a short in the wiring for the O2 sensor.   I currently have the same issue only my car finally threw a code after two days of it acting up.  Code 106.  Changed the MAP sensor and it now throws 108, MAP sensor high voltage circuit.  Ah the joys of cold weather and broke down vehicles.  But I know that you wont always get a code with a short.  Let me know if you fixed the problem.

Posted on Jan 08, 2009

  • Zak Hanson-Michelson
    Zak Hanson-Michelson Jan 08, 2009

    I know there was a recall on the cavaliers for a cover that wasn';t installed over the pcm, which is located behind the engine shroud which is in the passenger side front wheel well in front of the wheel.  I am in the middle of a lunch break while getting at mine.  Just call the chevy dealer and they should be able to tell you how to go about finding if your car was in for the recall unless of course you've done that.  I'll tell ya I liked it better when cars didn't have all this electrical ****.  
    About speedo:
    Inspect
    If your speedometer needle doesn't move, or if it flutters, your speedometer cable may be bad. 

    To determine if it is the cable, disconnect the cable casing from the transmission and from the back of the speedometer on the instrument panel. Draw the cable out from inside of the casing. The cable looks like a twisted piece or wire. If the cable is broken or if it is dry or brittle. It probably needs to be replaced. If the cable is intact and the same length as the cable casing, the problem is likely the speedometer head.

    Replace:
    When replacing a speedometer cable, you can either replace the cable and the casing, or you can replace just the cable. 

    To replace the cable and casing, unscrew or uplug the cable unit from the back of the speedometer and from the transmission. Screw or plug the new cable unit onto the speedometer and the transmission. 

    To replace just the cable, unscrew the cable. Remove the cable from inside of the casing. Insert a piece of universal cable cut the lenght of the casing into the cable housing. 

    Heat the casing fittings so that the glue on the ends is hot. Then, attach the cable to the cable casing and reattach to the transmission and speedometer.

  • Zak Hanson-Michelson
    Zak Hanson-Michelson Jan 09, 2009

    Found out that my problem was a plugged hose for the map sensor. Actually the nipple the hose for the map sensor connects to on the manifold below the throttle body was plugged. All I did was take some Wal-Mart brake cleaner and sprayed it in the nipple and attempted to stick a needle through it. Finally I was able to stick the needle through and proceeded to use a pipe cleaner to clean it. Car has never run better.

×

Ad

2 Suggested Answers

6ya6ya

6ya staff

  • 2 Answers

SOURCE:

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

Ad
mrgreenz

Daniel Arellano

  • 962 Answers

SOURCE: 1998 Cavalier 2.4 L stumbles and misses at 2000-2500 RPM

Vacuume Leaks can cause this problems. you have to do a through check of vacuum hoses and the EGR valve. Your best bet can be to have your vehicle scanned at an autozone store and get a code. The EGR has to be closed at idle, then as the engine warms up or is accelerated, the EGR opens. That is if your car does not have an electronic EGR . The electronic EGRs do not use vacuum to operate. They are controlled by the PCM (power train control Module).

Posted on Nov 20, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Rpm fluctuation


Plz Check Camshaft And Crankshaft Position Sensors

Nov 10, 2013 | 1995 Toyota Tacoma

1 Answer

My 96 bronco 5.8 stumbles on acceleration.


Did it spark well on all the plugs? Usually if you have no change in idle with two wires removed it needs a new set of spark plug wires. If it was cylinder 2 & 3 (side by side) then you should suspect a head gasket. Does the Bronco have multiple coils or a coil pack with multiple inputs? Are these two plugs hooked up to one coil?

Feb 11, 2010 | 1996 Ford Bronco

1 Answer

Ford f150 4.6 engine stumble


try cleaning the map sensor with map sensor cleaner.

Jun 12, 2009 | 2004 Ford F150

2 Answers

I have 02 L300 3.0 with cylinder1 miss fire.I


Swap the coil pack to another cylinder if it is individual. If not, you should be able to pull the wire away from the plug and hear it fire. If not, you have a bad coil. If so, I would look at doing a compression test and possibly a leak down test.

Jun 10, 2009 | 2002 Saturn L-Series

1 Answer

Car stumbles, backfires until warm


You need to replace your distributor. There has been many problems with these. I had the same problem with my 1993 villager and had tried many different things and none worked. I went to a junk yard and got a used distributor and now it runs fine. I would try this before anything alse.

May 30, 2009 | 1993 Mercury Villager

1 Answer

04 explorer running bad


If this is a coil pack ignition system (no spark plug wires, just a coil pack on each plug), this sounds like you may have a coil pack that is going bad. Do you have a check engine light on? You might also think about having someone take a look at your fuel injectors, if one or more isn't firing this will cause a miss that will sometimes seem like a faulty spark plug. Hope this helps.

Feb 19, 2009 | 2004 Ford Explorer

4 Answers

Missing and stumbling during acceleration


4.2 ltr missing. 2000 truck, f150. Changed plugs, wires. Ran great for 2 weeks. Started again. Changed coils. Got worse. Changed fuel filter, did nothing. Added injector cleaner and fuel cleaner, nothing. Checked EGR, o.k. It is getting worse. Had new gas about the time it all started.

Feb 07, 2009 | 2000 Ford F150 Flareside SuperCab

1 Answer

1998 Cavalier 2.4 L stumbles and misses at 2000-2500 RPM


Vacuume Leaks can cause this problems. you have to do a through check of vacuum hoses and the EGR valve. Your best bet can be to have your vehicle scanned at an autozone store and get a code. The EGR has to be closed at idle, then as the engine warms up or is accelerated, the EGR opens. That is if your car does not have an electronic EGR . The electronic EGRs do not use vacuum to operate. They are controlled by the PCM (power train control Module).

Oct 30, 2008 | 1999 Chevrolet Cavalier

2 Answers

Coil pack keeps going bad,


Your problem sounds like an intermittent short in the power feed to the coil pack from the EEC module

Oct 30, 2008 | 1996 Chevrolet Cavalier

Not finding what you are looking for?
1998 Chevrolet Cavalier Logo

1,717 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts

Marvin
Marvin

Level 3 Expert

85216 Answers

Jonah Oneal

Level 3 Expert

14092 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22485 Answers

Are you a Chevrolet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...