Hello everyone.

I have 2005 neon sxt that misfires at idle or at low rpm with the defroster or a/c on and when there's any type of load on the engine it will misfire all the time while driving.

I've changed the plugs, wires, coil pack, pvc valve and air filter to try to get to the bottom of this what has me puzzled is there's no check engine light on and i've scanned it twice just to be sure.

Check the fuel pressure if you haven't already, and if that is good, then check the engine's compression.