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

fuel check valve?

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Old 10-23-2005, 08:17 AM
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does anyone know where the check valve is located at??? i replaced the pump and it still drops fuel pressure when it primes..
Old 10-23-2005, 10:55 AM
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The check valve is in the fuel pump, if it still drops pressure after a new pump you may have a leaky injector. What kind of fuel pump did you install? I recently replaced mine and had the same problem and ended up finding several very small holes in the teflon line the attaches the fuel pump to the metel lines that run out of the tank.
Old 10-23-2005, 04:10 PM
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i put a walbro 255lph in..i replaced all the injectors..i cant figure it out
Old 10-23-2005, 06:41 PM
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regulator maybe?
Old 10-23-2005, 07:18 PM
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nope its got a new aeromotive one...
Old 10-23-2005, 07:34 PM
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ok how bout gas cap? gasket doesnt seal pressure bleeds off thats the problem i had after installing my racetronix unit... or maybe the gasket from the sending unit is leaking.

Last edited by SmokedOutZ28; 10-23-2005 at 07:44 PM.
Old 10-24-2005, 12:09 PM
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- regulator

- injector

- fuel feedline

- pump checkvalve
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