I have a PROBLEM
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From: brunswick, ohio
I have a PROBLEM,bad fuel pressure regulator? bad pcm? What!!! I have installed a LS1 engine in my 93 Typhoon, I just hooked up the wiring harness and ecm, the fuel pump does not cycle, I know it is only to run for a few seconds, but i hear nothing. Looking for the problem, i unpluged the relay, I tested the orange wire it has power, I attached the test light to the grn&white, ecm signal wire,and turned the key on and off, i expected to get a temporary light, i got nothing, so i used a jumper,and went from orange to gray, the pump ran, it shows no fuel pressure, I can hear the fuel running through the line, does the pressure regulator just send it back to the tank if the car does not start? shouldn't i see fuel pressure on the gauge? THANKS 
Last edited by sparkwirez06; Nov 15, 2005 at 05:32 PM.
Originally Posted by sparkwirez06
I have installed a LS1 engine in my 93 Typhoon, I just hooked up the wiring harness and ecm, the fuel pump does not cycle, I know it is only to run for a few seconds, but i hear nothing. Looking for the problem, i unpluged the relay, I tested the orange wire it has power, I attached the test light to the grn&white, ecm signal wire,and turned the key on and off, i expected to get a temporary light, i got nothing, so i used a jumper,and went from orange to gray, the pump ran, it shows no fuel pressure, I can hear the fuel running through the line, does the pressure regulator just send it back to the tank if the car does not start? shouldn't i see fuel pressure on the gauge? THANKS
Thread Starter
TECH Regular
iTrader: (18)
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From: brunswick, ohio
Well i figured out half of my problem!! i loosened the feed line and i had gas so i figured i might have a bad gauge. I removed the gauge and iI still had the shrader valve in it!! i removed it and replaced the gauge. i again jumped the power from orangeto gray and i had 60# fuel pressure. so now i have to figure out the computer side!!
Originally Posted by sparkwirez06
Well i figured out half of my problem!! i loosened the feed line and i had gas so i figured i might have a bad gauge. I removed the gauge and iI still had the shrader valve in it!! i removed it and replaced the gauge. i again jumped the power from orangeto gray and i had 60# fuel pressure. so now i have to figure out the computer side!!
Thread Starter
TECH Regular
iTrader: (18)
Joined: Feb 2005
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From: brunswick, ohio
the computer has been reprogramed, vats removed, any way to check? i have a predator programer that i received with the harness and computer, can i use it to check? sorry but i know very little about it. i did plug the predator in, the screen lights up, that means i have power. correct? THANKS
