Fuel Pump problems
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New User
Joined: Aug 2003
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Fuel Pump problems
I recently had my sending unit stop working and a day later my fuel pump. I checked my fuses, replaced my fuel pump, sending unit and relay. Checked the connectors for the wiring harness under the hood and fuse box. I still don't have power back at the fuel pump. Any ideas?
Jim
Jim
Elder User
Joined: Oct 2002
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From: Medina, Tn.
Check the wiring going to the relay and the eec power relay. Mine were intermittent that caused me almost 2 years of grief off and on. Both sets of wires will cause problems at the pumps. Wiggle them while someone is turning it over and see if you get anything. Worse case, get a Haynes manual. It will walk you through step by step etc... with no power.
Good luck,
Good luck,
Senior User
Joined: Mar 2002
Posts: 235
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From: Torrance, CA
Raeland, sorry to you use your post to talk about my problems, but I have a similar problem.
I went off roading today and my car stalled 4 times. I think it is my fuel pump because the "buzz" before ignition was gone after it stalled, and it didn't start. I left it there for like 3 mins, and it started without any problems. I was worried on my way back, cause it was like a 40 mile drive, but no problem. At this point I isolated the problem. It happens alot during downward inclines, regardless of the car being in 2WD or 4WD.
The only thing was I was driving through a car-wash, and it stalled again, but this time when I turned the ignition (and cursed alot) I got the fuel pump buzz (without waiting 3 mins) was there and the car started.
I am real puzzled - I haven't started to replace anything, but anyone got any ideas?
'94 XLT 5.8
I went off roading today and my car stalled 4 times. I think it is my fuel pump because the "buzz" before ignition was gone after it stalled, and it didn't start. I left it there for like 3 mins, and it started without any problems. I was worried on my way back, cause it was like a 40 mile drive, but no problem. At this point I isolated the problem. It happens alot during downward inclines, regardless of the car being in 2WD or 4WD.
The only thing was I was driving through a car-wash, and it stalled again, but this time when I turned the ignition (and cursed alot) I got the fuel pump buzz (without waiting 3 mins) was there and the car started.
I am real puzzled - I haven't started to replace anything, but anyone got any ideas?
'94 XLT 5.8
Senior User
Joined: May 2004
Posts: 219
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A inertia switch is a switch that shuts off power to the fuel pumps if you are ever involved in a accident. Sometimes if you hit a pothole or go over a bump it will trigger the inertia switch and you have to reset it.
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Senior User
Joined: Mar 2002
Posts: 235
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From: Torrance, CA
Oh.. ok I know that switch, AKA the fuel cut off switch right? The thing is that my truck started without "resetting" the switch. Does this mean that my switch is not bad? Or starting to go bad?
Anyway here's my question - should I just short out the connection so that the switch doesn't function? Cause if I'm off road, obviously the bumps could trigger that switch....
Anyway here's my question - should I just short out the connection so that the switch doesn't function? Cause if I'm off road, obviously the bumps could trigger that switch....
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Senior User
Joined: May 2004
Posts: 219
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Yeah you could jump the switch to keep it from triggering. But, you know your no longer going to have that safety feature. Really I think Ford is the only ones that use a inertia switch for the fuel pumps, so its really not needed but its good that its there. Maybe you could hook up a toggle switch so when your off roading you can turn it on. And when you drive on the street you can turn the switch off and still use the inertia swich.
Senior User
Joined: Mar 2002
Posts: 235
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From: Torrance, CA
Ok I just bought a new switch from FORD for about $25. Before I install it I want to ask everyone one last time... How many people out there that take their trucks on trails have just disengaged this switch? What I mean by disengage the switch is merely to short the wires so that this switch doesn't give you any more headaches.
Thanks
Thanks
