The engine runs fine while I'm driving down the road, but when I sit at a stop sign/light for more than 10-15 seconds, the engine starts to stumble. It also stumbles when I put the car into reverse. It doesn't stumble as much when I keep my heat/air conditioning off, or if I shift into neutral when stopped at a sign/light. I hooked an OBD code reader to my car and it threw the P0304 code. Is this referring to a bad spark plug, wire, or fuel injector? Or some combination of the 3?
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Thursday, December 8th, 2011 AT 10:55 PM