2001 expedition throttle problem
My 2001 expedition 5.4L is having a problem with fuel delivery. It runs fine up until I get to a light or stop sign, then Ill lose all throttle response and the engine starts stalling almost dying. If i floor it then I can get it to move but I can hear backfiring when I do it sometimes. This is what I've changed so far
Fuel pump, MAF sensor , all 02 sensors, IAC, pcv valve, throttle position sensor,
cylinder head temp sensor, air temp sensor. Ive also checked fuel filter and its fine. Strange thing is that when I changed the throttle position sensor, that helped a little as it give me response now when I floor it.
My next guess is fuel pressure regulator.... Anybody ever have this problem before?
Forgot to mention it wont always do it
Last edited by jrios6450; 06-30-08 at 12:35 PM.
Reason: edit:forgot to mention it doesnt always do it.