A faulty ECU, Engine Coolant Temperature sensor or MAF would result in a rich running condition. Thee are other possible causes as well.
So would a restricted return passage for fuel coming out of the fuel pressure regulator and bad injectors.
Your mechanic mentiond high fuel pressure, how did he come to the conclusion? Without a pressure reading, you started replacing components that have not been verified to be faulty. That is rather expensive.
Your mechanic mentiond high pressure
Monday, March 7th, 2011 AT 5:31 PM