Either one of the two sensors you havent changed can cause a rich condition. Both of those are used directly for fuel enrichment. The pressure regulator is mechanical while the MAP is electronic. Use a mechanical fuel pressure gauge to see what the pressure is. If the pressure jumps a few pounds when you rev the engine it the reg is probably good. If pressure stays when reving, the reg is bad.
Tuesday, April 13th, 2010 AT 9:49 PM