Self-inflicted code
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Team Owner
Joined: Sep 2001
Posts: 23,283
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From: Lake Elsinore, CA
Self-inflicted code
So, I noticed yesterday that my black C5 was all of a sudden running rough and threw the P0300 code. This started after the last round of exhaust manifold changes I did to de-mod the car so I figured I either didn't connect one or more of the plug wires back properly or I cracked one or more of the plugs by hitting it accidentally with one of the manifolds.
I picked up a set of plugs just in case and pulled the wires and plugs this morning and found this. I got lazy this time and didn't pull the plugs when I did the exhaust work. It was cracked in two places. Popped the new plugs in and she's smooth as ever.
I picked up a set of plugs just in case and pulled the wires and plugs this morning and found this. I got lazy this time and didn't pull the plugs when I did the exhaust work. It was cracked in two places. Popped the new plugs in and she's smooth as ever.
Team Owner
Joined: May 2006
Posts: 21,473
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From: Palmdale, Ca----- 2009 Cyber Gray 4LT A6 F55 452 RWHP 422 RWTQ- RIP 1998 C5 734 RWHP & 585 RWTQ-----
That'll do it! 
Good find too!
many are so reluctant to pull plugs thinking there is no way it could be them! 
Thanks,Matt
Good find too!
many are so reluctant to pull plugs thinking there is no way it could be them! Thanks,Matt
Thread Starter
Team Owner
Joined: Sep 2001
Posts: 23,283
Likes: 906
From: Lake Elsinore, CA
I put one of my C5's back to stock wrt intake and exhaust to prep it for sale. In California, a used car has to have passed an emissions test within 90 days prior to sale. Otherwise, I'd have to sell it out of state.
Matt, how goes it?
Matt, how goes it?
