camaro98z28

P0304 Misfire # 4 cyl and P0497

Came on yesterday.

camaro98z28

Im wondering if the P0497 is causing the misfire?

camaro98z28

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.

camaro98z28

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.

camaro98z28

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.

ChevyMgr

There are many things that will cause those codes.

camaro98z28

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?

ChevyMgr

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

camaro98z28

Ruh Roe..

ChevyMgr

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