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I have a 95' cavalier that backfires at about 1000 rpms at the same intervals, (sound like a rev limiter) this car has a underdrive crankshaft pully and a slightly ported head, could any of these cause this problem. The CPK and ICM and all underhood wiring has been replaced.

Submitted: 253 days and 15 hours ago.

Category: Chevy

Value: $15

Status: AWAITING CUSTOMER ACTION

Posted by ironmike 253 days and 15 hours ago.

Info Request

Hi XXXXXXX. Thank you for asking your question on JustAnswer. The other Experts and I are working on your answer. By the way, it would help us to know:

-How many miles are on your Chevy?

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-What have you already tried?

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253 days and 15 hours ago.

Reply

Its a 2.2 ltr and the engine has just been rebuilt. I replaced the CPK, the ICM and all the underhood wiring thinking it might be an electrical problem but still the same problem

Posted by ironmike 253 days and 15 hours ago.

Info Request

Greetings,
Does it have any codes? What is the

253 days and 15 hours ago.

Reply

I have a scanner but it wont pull any codes

253 days and 15 hours ago.

Reply

If there is a problem with the PCM can I use one from another 95' cavalier with a 2.2?

Answer

Greetings,
I think you can use another pcm from a 95 cavalier with a 2.2L. Codes are always the best and safest. There is a bunch of bulletins on injector cleaning issues. Usually misfires on most newer GM products are from lean issues or ignition wires/coil components breaking down. This style coil failure is common and if the wires are original. You could start by spraying the coils and wires with water, if they are bad you will stall the car and or see the spark arcing to ground. The injectors are known for clogging, you will have to see the spray for that.
Good luck Mike

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Expert:	ironmike
Pos. Feedback:	100.0 %
Answered:	3/13/2009

ASE Master Tech & T2 diesel engines

28 years experience foreign & domestic, Ford certified 05-06 GM certified 09

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Question

I have a 95' cavalier that backfires at about 1000 rpms at the same intervals, (sound like a rev limiter) this car has a underdrive crankshaft pully and a slightly ported head, could any of these cause this problem. The CPK and ICM and all underhood wiring has been replaced.

Info Request

Reply

Its a 2.2 ltr and the engine has just been rebuilt. I replaced the CPK, the ICM and all the underhood wiring thinking it might be an electrical problem but still the same problem

Info Request

Greetings, Does it have any codes? What is the

Reply

I have a scanner but it wont pull any codes

Reply

If there is a problem with the PCM can I use one from another 95' cavalier with a 2.2?

Answer

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Greetings,
Does it have any codes? What is the