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Jun 5, 2010 | 02:57 PM

AJ_1990

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4th Gear

Joined: Jun 2010

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need help!!

i have an 85 corvette that i had bought a few years ago.when i bought it the motor was siezed. i rebuilt the motor and it ran great for about 8 months. then i had a fire due to a leaky fuel regulator. not much damage was done just burt my fire wall, engine harness, distributer and a few other minor things.but since then i got every thing repaired and got it running again but when i start it up it idles ok but whn i give it a lil gas it wants to die unless i floor it. i thought it could b some vacume leak but everything was fine do yall think it could b my mass air flow sensor??

Jun 5, 2010 | 03:36 PM

CorvetteMike2024

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From: So. Cal.

2025 C7 of the Year Finalist- Unmodified

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Un plug MAF and see if it runs better.

Jun 5, 2010 | 04:23 PM

AJ_1990

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i did and it runs the same

Jun 5, 2010 | 09:15 PM

CorvetteMike2024

Corvette Enthusiast

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From: So. Cal.

2025 C7 of the Year Finalist- Unmodified

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Have you checked the fuel pressure at the shcrader valve? What about fuel filter? maybe plugged cats? Good luck....

Jun 5, 2010 | 09:38 PM

AJ_1990

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yea thats another think i cant seem to regulate my fuel pressure i bought a new adjustable fuel regulator and diaphram and the pressure stays up around 70 and it wont adjust down...cant figure out y.

Jun 5, 2010 | 09:47 PM

Muffin

Race Director

Joined: Jun 1999

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From: Merritt Ils Fl

At 70psi that thing is running(?) pig rich. I would pull the regulator and check it out cause something isn't right.

Jun 5, 2010 | 10:16 PM

John A. Marker

Le Mans Master

Joined: Mar 2004

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From: Dublin CA

The 85 pressure should be about 34-39 PSI at idle with vacuum line pulled from regulator and plugged. 70 is MUCH too high.

Jun 5, 2010 | 11:58 PM

AJ_1990

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4th Gear

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yea i know i took it apart before and everything seemed fine..when i turn the key on the presure reads around 40, its when the car is running that it shows 70psi