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ls1 swap wont start

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Old 12-27-2010, 09:19 PM
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Default ls1 swap wont start
Ok this ls1 conversion in 87 chevy truck. Truck was running for about week. My questions are is there any ways vats can reappear in pcm after being removed. Truck kinda backfired while running and now wont start. When I attempt to start it seems to back fire from intake? Any info please
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Old 12-27-2010, 09:29 PM
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When engine,harness pcm, were purchased. I was told from the guy the pcm was tuned and vats were removed.
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Old 12-27-2010, 09:36 PM
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Backfire sounds like some coil connections are wrong or your CAS was dieing and is now dead.
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Old 12-27-2010, 09:38 PM
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what you mean by cas?
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Old 12-27-2010, 09:40 PM
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Crank Angle Sensor. Common problem.
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Old 12-27-2010, 09:45 PM
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i'd vote crank sensor, its right above the starter. Check and make sure none of the wires burned against the header/manifold.
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Old 12-27-2010, 09:58 PM
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ok i will ck that!! thanks
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