massey839

i have a 04 gt with 70k miles. Last week the car started to idle funny and smell of gas in the exhaust. It shot out code p0302 so I replaced the spark plug, coil pack and fuel injector. The problem has gotten worse the idle needle goes crazy. It started shooting out code p0000 multi cylinder misfire. I have scoped the injectors and hook a computer to the car. Fuel delivery shows no issues. What could I be missing

bronxbomba63

Are the plugs correctly gapped?

dakman96

I agree, make sure the plugs are correctly gapped. With it being relatively low mileage, I'm not sure if this is the problem BUT I had the same symptoms with my 01 GT and it was an easy. Started as a rough idle, got worse and worse until eventually it would stall out. Turned out to be my Idle Air Control Valve (IAC). Took it off in 5 minutes, cleaned it with sensor safe carb spray real well, put it back in, ran like a champ. Worth a shot