My Mustang will idle normally but when the rpms drop from high the car dies out. If I'm coasting the rpms hold at 3000 until i stop, then it dies. The car is throwing P0172 and P0175, so both banks are running rich. The car has new internals, block, upper plenum, iac, egr valve, throttle position sensor, hoses and gaskets.
Jan 31, 2016 at 5:01 PM
