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?
Dec 8, 2011 at 10:55 PM
