I'm working on a 2005 Ford F-250 4 wheel drive with 5.4L 3v gas engine. On occasion it will not start, it will crank over fine but not start. Usually after 2 or three key-off, key-on sequences it starts. More often than not it will start first time.
I have replaced the fuel filter, fuel pump, and pump driver. I listened to the bottom of the tank while a friend cycled the ignition to "on" and the pump was."On'."On"."On". Off. Off."On"."On". Etc. No rhyme or reason. My next point of attack is the crankshaft position sensor. Unless someone has a better idea?
Saturday, December 8th, 2012 AT 2:02 AM