C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

1993 low fuel pressure KOEO

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Old 10-17-2018, 08:15 PM
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A.Danger.Powers
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Default 1993 low fuel pressure KOEO

Howdy! My lt1 is slow to start and has about 10psi key on engine off. 30s and 40s psi idle and accelerating. I just cleaned my fuel pressure regulator before I got this problem and think thats the culprit but want to make sure that's not standard for the fuel pump or filter or something before I drop some dough on parts. Thanks for the help!!
Old 10-17-2018, 08:38 PM
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PatternDayTrader
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Sounds like a pump problem.
The system should prime to something in the mid thirties when you turn the key forward.
Check voltage at the pump connector when you first key on before you replace the pump.
Old 10-17-2018, 09:00 PM
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Kevova
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Cleaned fuel pressure regulator? What did you do?
Old 10-17-2018, 09:02 PM
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A.Danger.Powers
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Sprayed it with some air... looking at my voltage for the fuel pump. Any idea on the specs and which wires to check? Thanks again
Old 10-17-2018, 09:10 PM
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Kevova
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Fuel pressure should be over 43psi. It should hold for 2- 2 1/2 hr. Key on fuel pressure should repond immediately.
Old 10-17-2018, 09:25 PM
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Thanks kevova... any thoughts on the fuel pump voltage and how to check it?
Old 10-17-2018, 09:39 PM
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12.6 or system voltage. Pull insert at fuel filler to access connector. Pressure should be focus.

Last edited by Kevova; 10-17-2018 at 09:40 PM.

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