Re: P0300-Random/Multiple Cylinder Misfire questions-Please help!
I think I might replace plugs and wires even though they are only a few months old. It's easy and doesn't cost much.
On the other hand, I have been home more often and have pinpointed when the misfire occurs.
It seems to only misfire after starting the car after it has been sitting overnight. I thought that maybe the head gasket was leaking into a cylinder or two after it cooled down but after starting the car and trying to back up, the idle oscillates and eventually it stalls - it only happens in reverse though. All this only happens when the car is cold and has been sitting overnight. Once it has warmed up, it runs fine.
Any ideas?
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