Did a fuel pressure test today and its running at 41 psi ? - Page 3 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 11-09-2006, 09:46 PM   #21
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I just wanted to point out that if, when you pull the vacuum line off the FPR, you see any gas there, replace the FPR regardless of the pressures you test. If gas is there then the FPR'* internal diaphram is leaking and letting fuel into the vaccum system.
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Old 11-09-2006, 10:00 PM   #22
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Quote:
Originally Posted by willwren
Quote:
Originally Posted by Damemorder
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Originally Posted by Tr00p3r
Is the test procedure the same for 93 bonneville ssei?
Yes.
But the pressures are NOT the same.

Does the 93 ssei have the regulator? My numbers are close to 39/40 at idle but drop under accel almost would love to define my issue as pump but buddy re borrowed guages to continue our gto project, I think unless you guys scream I need a new pump?
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Old 11-09-2006, 10:21 PM   #23
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reason for checking ? Im anal,lol just checking for the heck of it I guess, no hard start starts GREAT !
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Old 11-09-2006, 10:30 PM   #24
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FPR was replaced under warranty at 175K miles for free at the dealer
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Old 11-09-2006, 10:57 PM   #25
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FPR was replaced under warranty at 175K miles for free at the dealer
Then that makes you the luckiest guy I know!
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Old 11-09-2006, 11:00 PM   #26
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yea I was having trouble with it spitting gas and i check online and they said there was a Recall so i took it to the buick dealer, sure enough replaced for free !
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Old 11-09-2006, 11:04 PM   #27
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Quote:
Originally Posted by Tr00p3r
Does the 93 ssei have the regulator? My numbers are close to 39/40 at idle but drop under accel almost would love to define my issue as pump but buddy re borrowed guages to continue our gto project, I think unless you guys scream I need a new pump?
yes the 93 would have an FPR. reverify your pressures. At idle you should have about 41, disconnect the vacuum line from the fpr it should shoot up to around 50, put the vacuum line back on and it should drop to 41 again. turn off the engine and its should be able to hold near that pressure for several minutes while it bleeds off. The bleed off should be a slow process, if you see the pressure drop right off you have other problems.
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Old 11-09-2006, 11:13 PM   #28
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Quote:
Originally Posted by cvc
yea I was having trouble with it spitting gas and i check online and they said there was a Recall so i took it to the buick dealer, sure enough replaced for free !
Oh, recall. I thought you ment they replaced it under warrenty.
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