Good afternoon I have a question about a mystery im having. My 97 F150 5.4 starts but wont stay on it dies right away but it dosn't sputter before it dies it just dies immediately almost like if it was a bad ignition switch or something. I checked the fuel pressure at the fuel rail & it doesn't have any pressure, my first instinct was to check all relays & fuses all checked out ok, next I changed out fuel filter still nothing. Next I pulled down gas tank & replaced fuel pump, the fuel pump gets power & you can hear it sucking up the gas so its getting gas from the fuel pump all the way past the fuel filter, checked fuel lines to make sure & they have gas going thru them. Also checked inertia switch of course, its like its not getting fuel pressure from the firewall to the engine, I started to dissconecting different sensors to see if I can find a faulty one but still no luck. Can it be the Fuel pressure regulator maybe the PCM not giving out a signal, maybe missing something elsel? How can I go about checking these components, I checked pressure regulator vac line to see if presence of fuel but none, I realize it can still be bad. No codes when plugged up diagnostic. I would really appreciate your expertise & invaluable experience as this problem is keeping me from work & need to find out problem ASAP. Thank you for your time & maybe you guys can give me some kind of help it would really be appreciated.
have the same problem?
Sunday, May 24th, 2015 AT 10:24 AM