fuel pressure question
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Junior Member
Joined: May 2008
Posts: 14
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Car: 1990 iroc z
Engine: 5.7 350
Transmission: 700-r4
Axle/Gears: 3:23
fuel pressure question
i recenley have been having problems with my car not starting right away sometimes it takes 5 mins to crank i checked the fuel pressure yesterday and i have 28 when the fuel pump primes 36 when running but when i open the throttle to WOT it drops down to 20 i primed the fuel pump up and clamped the retun hose and the pressure didnt drop but im stumped is it the fuel pump bad or is it the fuel pressure regulator
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iTrader: (4)
Joined: Apr 2008
Posts: 482
Likes: 2
From: Tulsa Oklahoma
Car: 1990 IROC-Z 1LE
Engine: 5.7 TPI
Transmission: 700R4
Axle/Gears: G92 3.23
Re: fuel pressure question
Isn't the base fuel pressure, at idle, supposed to be 34? Might be time for you to replace the old one.
If you do replace it, please for the love of god, PUT IN THE AC DELCO REPLACEMENT PART. Do not try to save money here, i bought a aftermarket pump once for my Blazer. It lasted a few days. Airtex was the brand.
If you do replace it, please for the love of god, PUT IN THE AC DELCO REPLACEMENT PART. Do not try to save money here, i bought a aftermarket pump once for my Blazer. It lasted a few days. Airtex was the brand.
Last edited by Krik; Aug 9, 2009 at 02:18 PM.
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