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 Post subject: p0300 randon misfire
PostPosted: Mon Oct 15, 2018 12:42 pm 
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Joined: Tue Oct 08, 2013 4:04 pm
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Year and Trim: 2000 & 2005
Thought I would post what I failed to see to correct my random misfire.
I thought I had checked everything listed to correct P0300. It came down to a small crack in one of the ignition coils. Felt really dumb not seeing the crack and not checking the OHM test of each coil. I only used a ignition spark light tester and thought all the coils were good.
Maybe this will help others.


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 Post subject: Re: p0300 randon misfire
PostPosted: Mon Oct 15, 2018 4:31 pm 
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Certified Bonneville Nut
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Joined: Mon May 10, 2010 6:11 pm
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Location: Chicago, IL
Year and Trim: 2003 SLE
Thanks for posting your experience in this matter.

Always a good place to start with misfires or chugging/sputtering issues: check over the whole ignition system.

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 Post subject: Re: p0300 randon misfire
PostPosted: Tue Oct 16, 2018 6:09 pm 
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Location: Macedonia, OH
Year and Trim: 2002 SE
I think someone should post a picture on where the ignition coil is located....yanno. Just for reference

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 Post subject: Re: p0300 randon misfire
PostPosted: Wed Oct 17, 2018 12:26 pm 
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Location: Grand Rapids, Michigan
Year and Trim: 2014 Cadillac XTS Vsport.
Coils are on the lower left. It also shows which coils are associated with what cylinder.
Attachment:
plugwires.jpg
plugwires.jpg [ 73.85 KiB | Viewed 158 times ]

Another view of the coils, to the right of the supercharger serpentine belt, and above the dipstick.
Attachment:
coils.jpg
coils.jpg [ 124.08 KiB | Viewed 158 times ]

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