C4 (88) Vert bogging after warm - FPR?

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May 13, 2011 | 09:33 AM

Tony A.

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Racer

Joined: Apr 2011

Posts: 296

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From: Tipp City Ohio

C4 (88) Vert bogging after warm - FPR?

My car runs fine cold then when it warms up it bogs down while in gear at approx 2500 rpms.

Can anyone comment to how it may behave if the Fuel Pressure Regulator is defective? I've replaced everything in the fuel system except for the injectors and the FPR. Just trying to rule out the lower cost items before jumping into the big ticket ones. Is there an easy method for determining if the FPR is good or bad?

Thanks in advance....

May 13, 2011 | 10:08 AM

JustCruzin

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Joined: Feb 2011

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Quote:

Originally Posted by Tony A.

Don't think it's injectors, pull the vac line from the reg. If the FPR is bad you should see/smell gas in it. Just a thought.

May 17, 2011 | 10:02 PM

Tony A.

Thread Starter

Racer

Joined: Apr 2011

Posts: 296

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From: Tipp City Ohio

Quote:

Originally Posted by JustCruzin

Don't think it's injectors, pull the vac line from the reg. If the FPR is bad you should see/smell gas in it. Just a thought.

I checked the fuel pressure with a gauge and read 41psi ignition on, 37 car on and idle. But when I would rev the engine, the pressure would rise to 43, then bounce down to low 30's, then back up to 37.

Is this normal?

May 18, 2011 | 09:38 AM

AGENT 86

Team Owner

Joined: Jan 2003

Posts: 20,324

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From: Summerland B.C. Canada

Quote:

Originally Posted by Tony A.

Not normal

http://members.shaw.ca/corvette86/Fu...mDiagnosis.pdf

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