outta gas..car wont start. HELP!

[V_Stud]

well i ran the car on empty a little too long it sputtered out an died(i dont ever do this, but situation called for it). anyways i put a couple of gallons of gas in it..but now it wont start. i cant even hear the fuel pump turn on. i tried restarting it, but that hasnt helped. this is my only car and i would appreciate any input. thanks in advance,
TREY

 

[The Shape]

I have heard of people burning up fuel pumps on fuel injected cars by running them out of gas. If you don't even hear it prime up when you turn the key forward then it may be your pump bit the dust. If this turns out to be the case a stock replacement is farly cheap at any autoparts store (I Think I paid around $50.00 for mine) and will be easy to change out since you only have a couple of gallons in the tank.

 

[V_Stud]

Thanks Shape,
Yeah, I cant even hear the thing prime up, so I guess maybe I did burn it out. I just had it replaced by a friend of mine about a year ago..so I dont know how to do this? Is it hard? Any advice? Thanks,
-Trey

 

[Mavrick]

Did you get the car towed or anything? Your inertia switch could have been triggered, shutting off your fuel pump... try pushing the button back in and see if the pump will prime then.

 

[V_Stud]

Yea,
I tapped on the fuel pump reset box till the button clicked up, then i pushed it in and reset it again, but it still wont prime when I turn the key. How hard is it to replace a fuel pump?

 

[91LX302]

Fuel pump is easy. Drop the tank, take old out, put new in. That's the short version but that's really all there is to it. I need a new pump too, gonna have to wait till spring though.

 

[jrichker]

Troubleshooting fuel pump problems...

Clue – listen for the fuel pump to prime when you first turn the ignition switch on. It should run for 5-20 seconds and shut off. To trick the fuel pump into running, find the ECC test connector and jump the connector in the lower RH corner to ground. http://www.mustangworks.com/article...c-iv_codes.html for a description of the test connector. If the relay & inertia switch are OK, you will have power to the pump. Check fuel pressure – remove the cap from the schrader valve behind the alternator and depress the core. Fuel should squirt out, catch it in a rag. A tire pressure gauge can also be used if you have one - look for 37-40 PSI. Beware of fire hazard when you do this.

No fuel pressure, possible failed items in order of their probability:
A.) Tripped inertia switch – press reset button on the inertia switch. The hatch cars hide it under the plastic trim covering the driver's side taillight. Use the voltmeter or test light to make sure you have power to both sides of the switch
B.) Fuel pump power relay – located under the driver’s seat in most stangs built before 92. On 92 and later model cars it is located below the Mass Air Flow meter.
C.) Clogged fuel filter
D.) Failed fuel pump
E.) Blown fuse link in wiring harness.
F.) Fuel pressure regulator failed. Remove vacuum line from regulator and inspect for fuel escaping while pump is running.

The electrical circuit for the fuel pump has two paths, a control path and a power path.

The control path consists of the inertia switch, the computer, and the fuel pump relay coil. It turns the fuel pump relay on or off under computer control. The switched power (red wire) from the ECC relay goes to the inertia switch (red wire) then from the inertia switch to the relay coil and then from the relay coil to the computer (green wire). The computer provides the ground path to complete the circuit. This ground causes the relay coil to energize and close the contacts for the power path. Keep in mind that you can have voltage to all the right places, but the computer must provide a ground. If there is no ground, the relay will not close the power contacts.

The power path picks up from a fuse link near the starter relay. Fuse links are like fuses, except they are pieces of wire and are made right into the wiring harness. The feed wire from the fuse link (orange/ light brown wire) goes to the fuel pump relay contacts. When the contacts close because the relay energizes, the power flows through the contacts to the fuel pump (light pink/black wire). The fuel pump has a black wire that supplies the ground to complete the circuit.

See the following website for some help from Tmoss (diagram designer) & Stang&2Birds (website host)

http://www.veryuseful.com/mustang/t...witchWiring.gif

http://www.veryuseful.com/mustang/t...inks-ign-ac.gif

http://www.veryuseful.com/mustang/t...91eecPinout.gif