Last post on Sep 19, 2012 at 5:35 PM
You are in the Ford F-Series
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Ford F-150, Truck
#84 of 193 Re: 1993 F150 fuel system puzzle [ajax01]
May 12, 2009 (1:28 pm)
Ford did two different designs on that. One they used a rail mounted fuel pump driverside slightly forward towards the engine that pulls fuel trough the selector valve also on the rail drivers side about where the bed starts. Look for damaged wires at the selector valve from that exhuast sheild that fell off. It may have cut one of them.
If you have the design of two fuel pumps, it is probably the pump.
Your inertia switch kills power to your fuel pump[s] reguadless what design. If one is working, it is not that.
Be focusing on the selector valve. Good luck
#85 of 193 Re: 1993 F150 fuel system puzzle [mickeymouse2]
May 12, 2009 (2:43 pm)
The exhaust shield is on the passenger side right beside the tranny. It didn't fall off, only lost a bolt & rattled, so no cut wires from that.
When you say 'rail mounted' are you referring to the frame? I just put all new brake lines on and don't remember anything with wires (selector switch or pump) on the frame, but I'll look again. There is a fuel filter in the gas line that lays inside the frame about even with the drivers floor board.
I don't know where the fuel pump(s) is, but I assumed one in each tank.
Thanks for your comments.
#86 of 193 93 F150 P.U. Fuel system
Jun 15, 2009 (9:09 pm)
I am having a problem that while driving my truck the check engine light comes and the engine dies. When I go start it back the fuel pump just runs and does not shut off, could someone help me with this and please tell me what the flat pancake contraption is up next to the fuel injection manifold.
#87 of 193 Re: 93 F150 P.U. Fuel system [tgj1]
Jun 16, 2009 (6:12 am)
Can you retrieve the trouble code from your computer? If so, this will narrow down the problem. Are you sure you are not out of fuel? Not sure what the pancake contraption is in less it is the fuel back pressure regulator. The regulator restricts the amount of fuel returning to the gas tank, forcing more fuel to the injectors, thus making more fuel inter the cylinder to make it go faster. I suggest going to your local automotive parts store and pick up a Chilton (or equivalent) manual #266664 which covers 1987-1996 Ford Pickups. This manual will help you alot and only costs around $20.00. What engine do you have? Is there a vacuum line going to the pancake thing and is it hooked up and in good condition? Check all of your vacuum lines and wire connections before doing any repair work.
#88 of 193 Re: 93 F150 P.U. Fuel system [mike9408]
Jun 16, 2009 (3:04 pm)
my truck does have 300 6cyl motor with duel tanks and the metal contraption does not have a vacuum line to it and it looks like that i would have to replace the gas line with it.
#89 of 193 Fuel pump relay
Aug 27, 2009 (11:48 am)
1985 F-150 4WD 5.0 FI with dual tanks- 2 low pressure and one high pressure fuel pumps with no power going to them. Does anyone know where the relay and/ or fuse link is?
#90 of 193 Re: Fuel pump relay [oilslick01]
Aug 27, 2009 (12:06 pm)
Check the collision switch inside the cab on the firewall above your left foot. Reset button on top of it. Or relay may be on left finder well under hood.
#91 of 193 Re: Fuel pump relay [oilslick01]
Aug 27, 2009 (12:24 pm)
The relay is usually green in color on the drivers side engine compartment. The inertia switch or what the other person described as a collision switch can be located in 3 different areas; left kick pannel, right kick pannel, and on firewall inside cab on either passenger or drivers side. If there is no power going to the inertia switch with key on. it will be your ignition switch or fuel relay. Common issue is the fuel relay because it is mounted upside down and will collect moisture.
#92 of 193 Re: 93 F150 P.U. Fuel system [tgj1]
Aug 31, 2009 (10:20 am)
have you figured out this problem yet??? my truck is doing the identical thing?/????
Sep 05, 2009 (9:41 am)
1990 F150 4.9 EFI. Fuel pump runs for as long as a minute. It will then start, and with the exception of an occasional high speed miss, it runs ok. Same process to start it again. Found a loose, capped hose that was clipped to the frame in front of tank. Dont know where it goes. Could it be check valve or something else?