Frustrated. Code Thrown AGAIN. Help!

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09-29-2012, 06:07 AM

#21

robs

3rd Gear Member

Join Date: May 2006

Location: Ofallon, IL

Posts: 502

Did you ever find the issue? I've had Hot Rods in for about a year... couple weeks ago started tossing P0300.. went ahead and changed plugs (94000 miles)... Just tossed the code again. Engine runs fine.

From searches, could be anything

09-29-2012, 12:20 PM

#22

tx_zstang

5th Gear Member

Join Date: May 2007

Location: Central Texas

Posts: 2,388

What's the history of your alternator?

09-30-2012, 09:54 AM

#23

moosestang

6th Gear Member

Join Date: Sep 2006

Location: Gainesville, FL

Posts: 11,278

Quote:

Originally Posted by 08GTCA

Well you could always replace the #8 plug and see if the code returns. That will be fairly inexpensive. If it does return then i would swap your #7 COP with the #8 and then see if #7 throws a code. If it does then you know that it is a bad COP.

This would be my advice. These engines have random misfires all the time that don't throw a code, so it could be nothing. I've never gotten a misfire code before, but I know I had a misfire before.