My car has the 3.0L OHV engine. I have been experiencing a loss of power and "miss" at highway speeds since I have owned the vehicle. I own both the Ford shop manual and the Ford emission control and diagnostic manual. Both show different specs for my fuel pressure. The shop manual says 50-56 psi (350-380kpa). The emission diagnostic manual says 39-65 psi (270-450kpa), both koer. I have monitored the fuel pressure while driving with my scan tool and it stays near 270 kpa and fluctuates slightly over and below that number. Turning the A/C on is when the problem is most noticeable, and I do not see a rise in fuel pressure when I do. I am thinking I should check the fuel pump driver module as I have already replaced the pump with another unit (used). Also, what spec should I look at?
have the same problem?
Monday, August 23rd, 2010 AT 6:45 AM