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LT1 wont start

This is a discussion on LT1 wont start within the General Help forums, part of the LSx Technical Help Section category; I just pulled the intake saturday to replace the gasket. I just got everything back together today. The motor turns ...

  1. #1
    Awesome member Bad Co.'s Avatar
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    LT1 wont start

    I just pulled the intake saturday to replace the gasket. I just got everything back together today. The motor turns over but wont fire off. When you turn the key you can hear the pump kick in. I went as far as changing the coil out. Still the same thing. Any ideas?

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    O U 8 1 2 Spaz's Avatar
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    plug everything back in???

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    its short but its skinny. jiveass's Avatar
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    pewter
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    damn optispark...

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    Awesome member Bad Co.'s Avatar
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    everything is plugged back in. injectors, etc. i checked and rechecked. I hope its not the opti. i replaced it 2 months ago with the gmpp opti. My mechanic done that. I know it getting spark but i cant tell if its getting fuel. i pulled a spark plug on the head and put a screwdriver to and had a decent lil spark. Im thinking it a fuel issue.

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    O U 8 1 2 Spaz's Avatar
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    1999 trans am

    Quote Originally Posted by Bad Co. View Post
    everything is plugged back in. injectors, etc. i checked and rechecked. I hope its not the opti. i replaced it 2 months ago with the gmpp opti. My mechanic done that. I know it getting spark but i cant tell if its getting fuel. i pulled a spark plug on the head and put a screwdriver to and had a decent lil spark. Im thinking it a fuel issue.
    fuel pressure guage... $4.00 at a parts store... but most of the time it's the damned optijunk... bad set up where colant leaks into/on to it...

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    its short but its skinny. jiveass's Avatar
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    did you prime the fuel lines before trying to start it? and bleed the air out?

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    Awesome member Bad Co.'s Avatar
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    I was told you didnt have to prime the fuel system. I changed out the fuel filter today and still nothing. It looks like im headed to the shop tomorrow.

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    old timer blue02Z's Avatar
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    hmmmmm. get a spark tester to be sure you have a good strong spark. old school ways using a screwdriver can give eh results. get a fuel pressure gauge. remember you need pressure and volume

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    Awesome member Bad Co.'s Avatar
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    when i pulled the filter i turned the key to make sure there was fuel coming from the pump. It shot out significantly. To see if i was getting spark, while my wife was cranking the car i shot a lil wd40 through the throttle body to see if it would try to turn over and i got nothing. So now i think i got a spark issue. im still going to get a fuel pressure gauge just to see where im at. But for what its worth, when i pulled the fuel rail i was kinda careless with the fuel rail and layed it upside down on the side of the car while i made the repair. i wonder if i ruined the pressure regulator diaphram by doing that?

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