Multiple Cylinder Misfires OBDII code 300
Went to start the car this morning and it made a sound like one of those large cats, kind of sounded like a cougar, idle jumped to 1700 rpm and the SES light came on not even 3 seconds later. My exhaust smelled funky, like I had just gotten out of a dyno, and the gas was actually cold even after an hour of driving. For a while I thought that the worst had happened, my converter gave out after a measely 11k miles of service. All day my car was idling funky varying between 500 rpm to 1200 rpm but other than that it was running great once my foot was on the pedal, I kinda think it's stronger actually thought that may be due to the now cold and dry air. Autozone pulled out the code and diagnosed the problem as multiple misfires. Any ideas on what may be causing this, whether or not this is something I can take care of myself, will warranty apply, will the dealer give me hell about my mods if I take the car in, etc? At least my car no longer smells like its spewing pure gasoline.
