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LQ4 408 Not starting

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Old 10-02-2016, 04:27 PM
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Default LQ4 408 Not starting

Had a problem with the cam sensor last week and my tach was working then stopped then came back on while I was driving my car sat over night then I started it to take to the shop made it about 2 miles and my car back fired shut off and hasn't fired back up im lost I've changed the plugs and put a new cam sensor from Orilley auto and checked my crank sensor

Car is a 2001 SS with Lq4 stroker fully forged and TFS 255 Lsxr heads fast 102 intake/Tb original 6speed car converted into A4 with a 4l80e trans can't remember the cam specs but my brother said it sounds like the car is 180 off I have a double row comp cam timing chain is that even possible I'm doing a compression test right now I'll post up the results any idea please share them thanks
Old 10-03-2016, 07:57 AM
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There's a forum for such issues.......
Old 10-03-2016, 11:28 AM
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Originally Posted by Old Geezer
There's a forum for such issues.......
No **** you don't say🤔...how about unless you don't have advice you keep scrolling why waste your time
Old 10-12-2016, 02:52 AM
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haha good ole LS1tech.
bad PCM?
Old 10-12-2016, 04:19 AM
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Originally Posted by American Heritage
haha good ole LS1tech.
bad PCM?
that's what we thought also so I've swapped two different pcm's to test and same problem
Old 10-14-2016, 03:43 AM
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How about a compression test to verify everything is ok mechanically.
How is your fuel pressure with the key on?
When cranking?



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