LT1-LT4 Modifications 1993-97 Gen II Small Block V8

fuel pressure

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Old Dec 29, 2006 | 07:36 PM
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lt170chevelle's Avatar
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Default fuel pressure

i ran a pressure test on my 94 lt1 and it had around 35psi with the regulator hooked up and around 45psi when unhooked.oh yeah and that was running in idle is this a little low on pressure? i thought lt1,s ran higher pressure. just wanting to know am trying to find out the mystery power loss lately. thanks Mako
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Old Dec 29, 2006 | 07:59 PM
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I think that is a little on the low side. Normal is around ~40psi from what Ive seen.
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Old Dec 29, 2006 | 08:22 PM
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Stock fuel pressure is 41 - 47 psi with the vacuum line off.
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Old Dec 30, 2006 | 12:11 AM
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Yes stock pressure is around that with the line unhooked. With the vacuum hooked it depends on how much vacuum the motor makes and idle speed, mine is around 32 psi hooked.
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Old Dec 31, 2006 | 12:04 PM
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ok thanks...thats one possibility vanquished
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Old Dec 31, 2006 | 04:04 PM
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The one I'd worry about is when the guage is hooked up to the windsheild under load and its loosing alot of PSI under WOT
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Old Dec 31, 2006 | 07:31 PM
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ur pressure is fine dude
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