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Help us help you. By posting the year, make, model and engine near the beginning of your help request, followed by the symptoms (no start, high idle, misfire etc.) Along with any prevalent Diagnostic Trouble Codes, aka DTCs, other forum members will be able to help you get to a solution more quickly and easily!

[FIXED] 2008 Grand Prix 3800 cranking no start

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7 years 10 months ago #16790 by Tyler
No worries, thanks sir. :cheer: I figured the fuse got popped at some point during all the short to ground testing I'd suggested. Maybe the unplugged connector brushed up against the ICM mounting? Whatever, it's fixed! :silly:
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7 years 10 months ago #16797 by Tutti57

Tyler wrote: No worries, thanks sir. :cheer: I figured the fuse got popped at some point during all the short to ground testing I'd suggested. Maybe the unplugged connector brushed up against the ICM mounting? Whatever, it's fixed! :silly:

Now heading over to their house to see why it's misfiring. They said it did it the whole way home. I let them know that on of the could was cracked, so I'll start there.

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7 years 10 months ago - 7 years 10 months ago #16809 by Tutti57

Tutti57 wrote:

Tyler wrote: No worries, thanks sir. :cheer: I figured the fuse got popped at some point during all the short to ground testing I'd suggested. Maybe the unplugged connector brushed up against the ICM mounting? Whatever, it's fixed! :silly:

Now heading over to their house to see why it's misfiring. They said it did it the whole way home. I let them know that on of the could was cracked, so I'll start there.

Sent from my Moto G Play using Tapatalk

It was the cracked coil. The trusty gtc-505 showed that the wires on that coil only had 1.5-2kv compared to the others having about 5kv. A new coil fixed that.

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Last edit: 7 years 10 months ago by Tutti57.

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7 years 10 months ago #17098 by Tyler
Juiced105 finally found the Premium series I was looking for. :woohoo: Just adding this to the thread for anyone searching later.

www.scannerdanner.com/scannerdanner-prem...se-study-part-1.html
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