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Old 04-04-2009, 03:46 PM   #1
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Default '05 3800 motor won't start-no spark

ran fine one day won't start the next, cranks ok
. diagnosis machine showed no code, no spark from coils, coil module tested ok, fuel pressure ok

where to start? crank sensor or coil module
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Old 04-04-2009, 04:08 PM   #2
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you can test your coil packs https://www.gmforum.com/t278818/
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Old 04-04-2009, 04:29 PM   #3
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Does your car have a VATs? If so, try a different key.
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Old 04-06-2009, 07:09 PM   #4
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checked coil packs, 1-4 tested 1.0-1.1, 2-5 tested 0.7 and 6-3 tested 0.7 should I replace 1-4 pack or would it make a difference?
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Old 04-06-2009, 07:21 PM   #5
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Quote:
Originally Posted by wheatboy View Post
should I replace 1-4 pack or would it make a difference?
I think the difference between this pack and the other two would warrant a replacement.
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Old 04-06-2009, 08:03 PM   #6
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It'* best to have the coils all very close. You will have to check yoru new one as well to see how balanced they are.
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Old 04-06-2009, 09:59 PM   #7
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Whats? a VATs
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Old 04-06-2009, 10:01 PM   #8
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Anti theft system
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