PO300 Random Missfire
Thread Starter
Melting Slicks
Joined: Sep 2005
Posts: 2,568
Likes: 212
From: Winnipeg
PO300 Random Missfire
I got the PO300 random missfire last night outta the blue. Pulled the plugs, wires. The front pass. side plug was only one wet with gas and all the carbon wiped clean off the ring at the top of the threads. The other 7 were all fine. Now for the experts, could this be a bad plug?( plug looked fine otherwise). Bad wire? Wire looked fine too, or possibly the single coil pack?? Should I just do plugs, wires and try? If still missfires then replace the coil? What do you guys think? BTW my Z06 has only 12.5K miles. Plugs were replaced last summer when I bought the car ( TR55's). Wires are original.
Thanks
Derek
Thanks
Derek
Thread Starter
Melting Slicks
Joined: Sep 2005
Posts: 2,568
Likes: 212
From: Winnipeg
Yeah most of my wires looked pretty crusty inside the boot being 6 years old. Threw new TR55's in today, and have some Taylor 409 10.4 mm LS1 wires ordered to be here and installed on my car by Friday. That should do the trick I think. 
