what is your fuel pressure supposed to be? - 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 04-19-2006, 10:17 PM   #1
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Default what is your fuel pressure supposed to be?

1992 ssei...
whats the fuel pressure normally?
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Old 04-19-2006, 10:40 PM   #2
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Fuel pressure should be at least 38lbs when tested properly. Hook up gauge, turn key on..bleed out air..turn key off then back on once or twice to obtain max pressure..leave gauge on for 10 minutes and observe if any leak down occurred.
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Old 04-19-2006, 11:27 PM   #3
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for a 92 SSEi the fuel pressure should be in the neighborhood of 41-47 Psi

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Old 04-19-2006, 11:31 PM   #4
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If your are having problems with fuel pressure, the 1992'* have problem fuel pumps.
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Old 04-20-2006, 01:34 AM   #5
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well i checked the fuel pressure and it read 42 and dropped about 5 psi in ten min,
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Old 04-20-2006, 09:10 AM   #6
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Start the car, let it run at idle, then disconnect the vac line to the FPR. What does it read?
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Old 04-20-2006, 01:41 PM   #7
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You really need to have a gauge testing the fuel pressure when your under a load and in the boost. If it starts to drop off when in the boost your fuel pump is starting to get weak. You should gain one lb. of fuel pressure for each lb. of boost.
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Old 04-20-2006, 07:50 PM   #8
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Quote:
Originally Posted by willwren
Start the car, let it run at idle, then disconnect the vac line to the FPR. What does it read?
well i will have to try again and disconnect the vac line but when it was running it read 42 and jumped up when the throttle was applied
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