Running Bad

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Feb 9, 2014 | 03:42 PM

98z8uup

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Running Bad

I have a 96 Vette, it's running real bad. It's idling up and down when the car warms up.

Feb 9, 2014 | 08:58 PM

98z8uup

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I change the plugs and wires in the car.

Feb 9, 2014 | 10:18 PM

jrwilliams95z28

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From: Mississauga Ontario Canada

If it's hunting it could be a vacuum leak.

Feb 10, 2014 | 12:18 AM

98z8uup

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I will look into that.

Feb 10, 2014 | 02:28 AM

Catmaigne

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From: Conshohocken, PA

It only surges when the car is warm? If it runs fine when it's cold then try unplugging the MAF to keep it in open* loop, then warm it up and see if the problem persists.

Last edited by Catmaigne; Feb 10, 2014 at 11:11 AM.

Feb 10, 2014 | 06:22 AM

98z8uup

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Quote:

Originally Posted by Catmaigne

It only surges when the car is warm? If it runs fine when it's cold then try unplugging the MAF to keep it in closed loop, then warm it up and see if the problem persists.

I will try this when I get off work.

Feb 10, 2014 | 11:16 AM

Catmaigne

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From: Conshohocken, PA

Oops, I meant to say open loop.

But if it runs fine when cold and acts up when warm then it could be a EFI issue. I had a similar problem when an O2 sensor went. Car ran like crap in closed loop after warming up but was fine cold.

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