Another fuel issue?
Thread Starter
Advanced
Joined: Nov 2011
Posts: 79
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From: Rock Hill South Carolina
Another fuel issue?
Well, I have finally gotten my Corvette running after replacing the fuel pump/strainer, fuel filter and fuel pump relay.
My garage has been smelling pretty strongly of gas lately and there are no visible leaks from the Corvette. I can smell gas by the Schraeder Valve (granted, I did press it down a few days ago and there might be some left over gas on the fuel rail, I also don't have a cover for my Schraeder Valve).
Basically, the issue is this: Under heavy acceleration and so far, only in first gear, it will hesitate for a few moments, then resume under acceleration after the hesitation. During normal accel, it runs great.
Someone not on this forum, who used to own a C4 stated it could be a faulty/leak FPR? Any other thoughts, advice, write-ups?
Thanks in advance. I have been learning alot from the experts here on this forum.
My garage has been smelling pretty strongly of gas lately and there are no visible leaks from the Corvette. I can smell gas by the Schraeder Valve (granted, I did press it down a few days ago and there might be some left over gas on the fuel rail, I also don't have a cover for my Schraeder Valve).
Basically, the issue is this: Under heavy acceleration and so far, only in first gear, it will hesitate for a few moments, then resume under acceleration after the hesitation. During normal accel, it runs great.
Someone not on this forum, who used to own a C4 stated it could be a faulty/leak FPR? Any other thoughts, advice, write-ups?
Thanks in advance. I have been learning alot from the experts here on this forum.
Safety Car
Joined: Jan 2004
Posts: 3,556
Likes: 13
is doing under different driving conditions.
Anything else is pure guess work
Race Director
Joined: Apr 2002
Posts: 10,036
Likes: 346
From: Anaheim CA
Remove the vacuum line from the fuel pressure regulator and check for fuel in the line. Do this right after shutting off the engine, as the fuel can evaporate and look dry.
If the FPR diaphragm is ruptured, fuel will flow through the vacuum line into the plenum. See my thread called "Playing With Fire" to see why a ruptured FPR diaphragm is bad...
http://forums.corvetteforum.com/c4-t...t=playing+fire
If the FPR diaphragm is ruptured, fuel will flow through the vacuum line into the plenum. See my thread called "Playing With Fire" to see why a ruptured FPR diaphragm is bad...
http://forums.corvetteforum.com/c4-t...t=playing+fire
Last edited by Cliff Harris; Oct 10, 2012 at 01:10 AM.
Le Mans Master
Joined: Sep 2006
Posts: 6,050
Likes: 147
From: Phoenix AZ
2021 C4 of the Year - Modified Finalist
Sometimes, if your timing is off, the knock sensor tells the computer that the engine is pinging, and the computer may retard the timing up to 11 degrees.
Recheck your timing.
Recheck your timing.
