Here's the deal: My 1996 Bronco 5.8L will not start. It will turn over, but not start. I can't hear the fuel pump kick on at all. I have replaced the fuel pump relay, but it still doesn't start. My Haynes manual says I can test the fuel pump through the data link connector, but for the life of me I don't know how to do that. I posted the same thing on fullsizebronco.com and was be-littled. I know a little bit about cars, but don't usually try and fix things myself, but I can't really afford the $350 my mechanic wants right now. Could somebody please help me without treating me like crap?
There are various Fuel System Trouble Codes that may lead you to the problem area; Do you have a check engine light on?
Anyway, I believe some non-emission faults won't light it off; so beg or borrow an OBD II Code scanner and run the test.
Some DTCs are
Poor fuel pump Ground
Open/shorted ckt in pump
bad pump (Locked fuel pump rotor)
Fuel Pump control out of Self-Test range
or;
Plugged fuel filter
By Ford for 96 OBD II:
As fuel system components age or otherwise change over the life of the vehicle, the adaptive fuel strategy learns
deviations from stoichiometry while running in closed loop fuel. These learned corrections are stored in Keep
Alive Memory as long term fuel trim corrections. They may be stored into an 8x10 rpm/load table or they may be
stored as a function of air mass. As components continue to change beyond normal limits or if a malfunction
occurs, the long term fuel trim values will reach a calibratable rich or lean limit where the adaptive fuel strategy is
no longer allowed to compensate for additional fuel system changes. Long term fuel trim corrections at their limits,
in conjunction with a calibratable deviation in short term fuel trim, indicate a rich or lean fuel system malfunction..."
& FYI on the CEL'
Occasional flashes show momentary malfunctions. It stays on if the problem is of a more serious nature, affecting the emissions output or safety of the vehicle. A constantly flashing MIL is a sign of a major problem which can cause serious damage if the engine is not stopped immediately. In all cases a "freeze frame" of all sensor readings at the time is recorded in the central computer of the vehicle