Question about 1995 Ford Crown Victoria
Have changed the sending unit, 3 pumps, checked grounds, relays, fuses, bypassed inertia switch, some of these things got the pump going then it stops this trouble started all at once has been a very good car drove the car 15 miles or so it just cut off cranked back once that was it any help out there I'm lost here
Did you tape a fuel pressure gauge to the windshield,to see if your really loosing fuel, when it quits.
Did you consider the MAF sensor,TPS Sensor.
The pump won't run if it isn't needed. If the PCM doesn't see a crank signal or other data it needs,it won't keep the pump going.
You may be working on the symptom,not the cause.
Posted on May 13, 2010
Testimonial: "will give this a try thank you very much"
Check the inertia switch, usually on the passenger side inside the trunk. It's a safety cutoff switch that cuts power to the pump if the car gets hit in an accident, doesn't take much to trip it.
Posted on May 13, 2010
Testimonial: "thank you for your time and advice"
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Posted on Jan 02, 2017
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Mar 25, 2017 | 1988 Ford F 150
· Fuel Pump secondary circuit shorted to power
· Fuel pump relay contacts always closed
· Open in fuel pump monitor (FPM) circuit between ECU and connection to POWER TO PUMP circuit
· Heated Exhaust Gas Oxygen (HEGO) sensor shorted to power
· faulty ECU
Engine Does Not Start:
· Open inertia switch or inertia switch circuit
· Open in or between ECU and fuel pump (This includes open in fuel pump brushes/windings)
· faulty ground connection at fuel pump
The easiest way to check this circuit is to go to the fuel pump relay. If the relay clicks when the key is turned to the "RUN" position, then the inertia switch circuit is ok.
The Pink/Black wire starts from the fuel pump relay and goes two directions. One side goes back to the fuel pump. The other side is the fuel pump monitor circuit and goes to pin #8 at the ECU. This wire should only be hot for a second or two when the ignition is turned to the RUN position.
The fuel pump relay receives power on the Black/yellow wire. It comes from a fusible link at the power distribution center. This wire should be hot at all times.
If all the above is working as designed, them you probably have a bad fuel pump.
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