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Discussion Starter #1
I currently have an engine code for P0449 which I have another thread for and I believe I have the fix for it (waiting on weather to improve to change the EVAP Vent Solenoid).

However, today I started the car up and it idled very rough and the check engine light began flashing, my "Service Stabilitrak" warning and light came on. After about 15-20 seconds the engine smoothed out and when I pulled it into the garage the Stabilitrak warning had gone away, and the CEL stayed solid. I read the code and got P0300 for multiple cylinder misfire. I then took it on a few mile drive and ran it up to 80mph with no issues. I didn't get any sort of hesitation at all, no strange sounds, nothing.

I'm wondering if this could be a side-effect of my P0449 code, and if anyone else has had this issue. I've had the car rough idle on me once before, however it never threw a code and it only lasted for about 5 seconds.

I may change the plugs, but it really looks like a PITA on this 3.6 V6.
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