Originally Posted by
GT5.0HO_STANG
but then other days it runs smooth and then itl run rough again.
i'll try replacing the thermostat just for sh*ts and giggles but im pretty sure i installed it right but you guys recommend a 160* ???
Sounds like too me, you have a couple different issues, that may not be related. When is the last time you done a full tune-up? Plugs, wires, cap, rotor, fuel filter ect. Cleaned the MAF and IAC?