Fuel pressure problem. need help!!

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Aug 2, 2009 | 01:18 PM

Lamaro_Z28

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Joined: Jul 2009

Posts: 12

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From: Topeka, KS

Fuel pressure problem. need help!!

my z28 has been hesitating and wont start the first 1-2 tries depending on how long it sits but it will always start on the 3rd. so i did a fuel pressure test and at idle it had 36psi and when revving it went up to 42-43psi. i know thats not what psi it should be. so my main question is what psi should it be running at? also im pretty sure that means i need a new fuel pump??

please helpp

Aug 2, 2009 | 02:22 PM

2001NBMZ28

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Joined: Dec 2001

Posts: 5,399

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From: Jacksonville, FL

What year? LS1's should be 55-61 key on, engine off. Fuel filter changed recently?

Aug 2, 2009 | 02:23 PM

LS6427

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From: South Florida

Not neccessarily, you could just have dirty injectors. Time for an entire can of Sea Foam in a 1/4-1/2 tank of gas.

Run it out. Then change the fuel filter.

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