Quote Originally Posted by Dan L View Post
Two things come to mind right away. If the engine has over 500 hours change the spark plug leads. But youíve done that already.

Second, have you leaned it aggressively when you throttle back?

With full rich my O-340 will run rough under those conditions too. Even worse if I pull carb heat thinking it is ice. Leaning is all it takes for me.

Only test flew the a/c wit the new Coils x 4, Spark Plug Leads x 8 and new Mini-sensors x 2 yesterday late afternoon.
All went well but need further hours.

Thanks Charles