P0304 Misfire # 4 cyl and P0497

Came on yesterday.

 

Im wondering if the P0497 is causing the misfire?

 

No replys? well wish me luck, I made an appointment wit hthe Dealer near my house. I hope its a quick fix. Seems like it because it's nothing mechanical from what I see.

 

Took it to the dealer and they did what ever to the evap. Cleared the code. Well now I have a CEL again. I have an apointment again on monday. I pulled number 4 cyl plug and coil and the plaug didn't look normal. I wonder if I have a bad coil. It's misfiring I know and can tell. Anyone know if coils go bad at 22K miles? Never had an issue with coils before.

 

Took it back to the dealer and now they are seeing Multiple Misfires on all cylinders. What can just go bad without touching anything.. Computer going out? Nah.

 

There are many things that will cause those codes.

 

Well They have it and Im in a rental. G6 GT. Nice car. :) They said they fixed the Purge code but now it's just the misfires. Fuel?

 

Could be dirty fuel in the rail, but we find electrical problems (wiring) and cylinder head problems.

 

Ruh Roe..

 

No worries, the head is covered by powertrain. A compression test will tell for sure.