Question about 1996 Chevrolet Cavalier

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96 Chevy Cavalier running on 2 Cylinders

We started with replacing the igniton Module, then found that the starter was cracked and replace it. Checked all plug wires, they are fine, tested crank and cam senors nothing wrong there. Replaced the CPU car still on runs on 2 cylinders. Please Help. Oh and yes we did have the cpu flashed to car.

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  • wishinewb4 Jun 25, 2009

    car is giving a random mis code,

  • wishinewb4 Jun 25, 2009

    car is now at local shop and they dont seem to be able to fix.... Im so frustrated...

  • wishinewb4 Jun 25, 2009

    Car is a 4 Cylinder, My husband is capable of doing repairs.We do not have the car back yet. Shop is refusing to give up and is not charging to look further at the problem. Im not sure which cylinders it is. This is going to sound sure like a dumb response But it is the 2 in the middle if your looking at the motor, that are not firing.



    Thanks for all the Help

  • wishinewb4 Jun 26, 2009

    Ned, I would first like to thank you for taking the time to respond. LOL and no not a neighbor , we are in Missouri.



    Im am due to talk to the shop again Monday and will see what they have come up with. The compression test has been done.

    As far as the cylinder leakage test im not sure, will find out.



    Will post as soon as i have more info.



    Thanks again Jamie in MO.

  • wishinewb4 Jul 08, 2009

    Update Car is finally fixed. Broken wire to the coil case.

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  • Chevrolet Master
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Which two cylinders?

Posted on Jun 18, 2009

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  • Ned C Cook
    Ned C Cook Jun 25, 2009

    can you give me the results of the compression test? What have they come up with, if anything? Let me gget some info from you. Are you capable of self repairs? Tis, I hope is a 4 cylinder, right? What two cylinders are the nice ones? front to back 1234? or right to left 1234?

  • Ned C Cook
    Ned C Cook Jun 25, 2009

    Yes, you are correct, and dumb, it is not. Any way you could reference it is fine. Ok,2 and three are acting up. That, is good in the fact that the problem is narrowed down cinsiderably. We are no longer in question of electrial. Ther is a test we need to do, many mechanics won;t go to the trouble of doing it for one reason or the other. I'm also getting frustrated over the "can't" find answers and all the waisred time. Here is the test: The two center plugs need to be removed, then the cooling systym needs to be topped f and pressurerizedand left standing under approx. 30 minutes to an hour depending on how fast your results appear. Two cylynders side by side means they are affecting each other. It is suspect that the head gasket is psssing either coolant,which introduces moistur if no liquid between the two or the compression is being compromised by the crossing over. This usually occurs in the center of a 4 cylinder head. There is another test that is also very useful, That would be the cylinder leakade tes. Pressurizing each cylinnder with compressed air and notine at different points ifthere is leakage, like the intake manifold, the exhaust tail pipe, or radiator. Side by side is easy due to only one cylinder needs to be pressurized, hough both if no results on the one.Side by side issues is termed,"swapping holes" I give you these terms so in discussing the problem you can talk the talk and get them of the superiority "they know what they are doing" trip. If your husband is willing, I can walk him through a head gasket change if needed. Fire these questions at the mechanics.

    1. Has a compression test been performed?

    2. Has a cylinder leakage test been performed?



    I have no doubt they have change virtually every part they could push off on yo, So untill you hit a mechanic that is a bit more analytical, this can go on forever. This is really going to bug me if you are a neighbor of mine. :-(. Wouldn't that be the pits? Where are you located? City and state? I'm in Riverside, Calif. Well, let me know if your husband wants help, My cell number is 909-630-3192 and my name is Ned. I'll be here if you need me. Good Luck

  • Ned C Cook
    Ned C Cook Jun 26, 2009

    Works for me Jamie in MO. I truly wish I could look at this personally. Not that i could do any magic but I'm a strong believer it timed diagnostics. If it takes a mechanic longer to find the problem than it does to fix it when found. The tail is wagging the dog. So, untill then, I wish you good luck. Let me know what they come up with next and may I can back your decision on what to do. And, you are welcome. - Ned

  • Ned C Cook
    Ned C Cook Jul 08, 2009

    What did they end up finding Jamie?- Ned

  • Ned C Cook
    Ned C Cook Jul 10, 2009

    Thank you for the update Jamie. That was good of you. Glad you got it repaired. _ Ned

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You said the the 2 cylinders in the middle has no fire. That will be 2 & 3. It has 2 coil packs. One runs 1 & 4 the other runs 2 & 3. Check the coil pack that runs 2 & 3....The firing order is 1,3,4,2... It runs because it hits,miss,hits,miss....just enough to keep it running....

Posted on Jun 28, 2009

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First of all stop spending money on parts you need to do a compression test on all four cylinders. remember it takes 90 pounds to fire fuel if you have two cylinders at 145 pounds or 150 pounds then your two bad cylinders are 30 pounds or 50 pounds then theres your problem. you could have burnt valves or possibly the engine jumped timing. rule of thumb when ever you have a running problem always check engine compression before you do any repairs. and check for trouble codes.

terry - master tech

Posted on Jun 18, 2009

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