Lamaro_Z28

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

2001NBMZ28

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

LS6427

iTrader: (2)

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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Lamaro_Z28

its a 97 lt1 and do your think a dirty filter can cause your car to not start until the third try? but ill try Sea Foaming it and see if it works

2001NBMZ28

LT1 is different, maybe you can find the answer here: http://shbox.com/1/4th_gen_tech2.htm...essure_testing