feul pressure again
Thread Starter
Race Director
Joined: Mar 2002
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feul pressure again
ok i can't keep it up again, the feul pressure that is, when i turn the key on the feul pressure jumps up and then instantly drops off again, i can hear it draining back but can't tell were exactly the sound is coming from. i have a new pump and filter, new regulator etc. i figured that i had a leaky injector so i lifted the feul rails and turned the key on to pressurize the system to check for a leak but found none. on one of the injectors i could smell a little feul but that was it, maybe that's enough, what do you guys think :cheers:
Team Owner
Joined: Dec 2000
Posts: 90,675
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From: SE NY
Cruise-In II Veteran
Re: feul pressure again (atotalnincompoop)
A new fuel pump should rule out the check valve so I suspect the fuel pressure regualtor (FRP).
To test it, clamp the return line and prime the fuel rail; if no drop, replace the FPR.
To test it, clamp the return line and prime the fuel rail; if no drop, replace the FPR.
Thread Starter
Race Director
Joined: Mar 2002
Posts: 12,968
Likes: 0
Re: feul pressure again (65Z01)
here a dumb one, which one is the return line? I thought it might be this so i just put a rebuild kit into it, but the problem is still there, could i have installed it wrong, it seemed idiot proof? :cheers:
[Modified by atotalnincompoop, 7:14 PM 10/17/2002]
[Modified by atotalnincompoop, 7:14 PM 10/17/2002]
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
Re: feul pressure again (atotalnincompoop)
Two pipes loop around to the right side of the fuel tank.
The forward one is the feed line; the rearward one is the return line, at least on an '88 Vette. OK, it's the same diagram on an '85 Vette.
[Modified by 65Z01, 6:20 PM 10/17/2002]
The forward one is the feed line; the rearward one is the return line, at least on an '88 Vette. OK, it's the same diagram on an '85 Vette.
[Modified by 65Z01, 6:20 PM 10/17/2002]
Burning Brakes
Joined: Jun 2002
Posts: 883
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From: Duluth MN
Re: feul pressure again (65Z01)
Be sure to check on the sending unit itself the metal lines to see if between the pump and the top of the tank there is not a hole anywhere as was the case with mine.. It seems the metal lines rub the tank and eventually caused a hole in the soft metal lines.. I had the line welded..Fixed the problem
