fuel pump module
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fuel pump module
I have learned that my 2002 f150 has a fuel pump module. It is suppose to be above the spare tire but when looked it was not there. I have checked the extras ie... fuses,relays,and inertia switch but still no power to pump. Once in a great while when I have calmed down I will go back hanger queen and she will either attempt to start or start and run for a little and then turn off.
Once again I am hoping for a new location to search for this module.
Thank You.
Once again I am hoping for a new location to search for this module.
Thank You.
Lead Driver
Joined: Sep 2006
Posts: 7,907
Likes: 143
I would advise you to go about this from a different perspective.
1.Does the fuel pump run for about 3 seconds each time you turn the key to 'run' only?
2. If no there is a power issue.
3. If yes, how much fuel pressure is observed on a pressure gauge attached to the fuel rail?
4. If much less than 30 psi the pump or regulator may be faulty or even the fuel filter is plugged.
I am trying to get you to diagnose the system to see what the most likely fault is instead of chasing blindly hoping to get lucky/
Good luck.
1.Does the fuel pump run for about 3 seconds each time you turn the key to 'run' only?
2. If no there is a power issue.
3. If yes, how much fuel pressure is observed on a pressure gauge attached to the fuel rail?
4. If much less than 30 psi the pump or regulator may be faulty or even the fuel filter is plugged.
I am trying to get you to diagnose the system to see what the most likely fault is instead of chasing blindly hoping to get lucky/
Good luck.
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response
Thank you for your response, unfortunately I did diagnose the problem no power feed. I should have broken down my steps instead of just giving results. When I did not hear the pump come on I check for power. When I had no power I checked fuses. When fuses showed power I felt the relay for a click instead of just listening for it. My next step was the inertia switch and after having power and no luck jumping across contacts I went to a wiring diagram. What I found on the diagram was a fuel pump module. Then I went online to track down where this beast lies. What I found was it should be located above the spare tire carrier. For some unknown reason I dont have one there, nor is there a connection that might have assumed one was located there at one time. I would love to tell you that I have enough pressure to measure but I dont. What I am hoping for is that Ford might have located this module some other place than just the one I found.
Hotshot
Joined: Jan 2004
Posts: 19,762
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From: St Louis
Did you keep that two second timing window due consideration whenever you did your voltage checks? That's all the time you have after turning the key from OFF to RUN. Any voltage checks made after that brief interval are irrelevant.
You don't have a fuel pump driver module, that didn't start until the 2004 model year. Your actual fuel pump is inside the fuel tank.
You don't have a fuel pump driver module, that didn't start until the 2004 model year. Your actual fuel pump is inside the fuel tank.
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Yes I did. I thought the same thing about when it started but when I started pulling up the diagrams and typed in my year it kept coming up. I have ruled out the pat system because the light is not blinking. If I don't have a module does that mean that the power for the pump comes from the pcm? If so how do you recommend I test it. Should I reconsider the pat system and check it anyway?
Hotshot
Joined: Jan 2004
Posts: 19,762
Likes: 1,079
From: St Louis
PATS has nothing to do with the fuel pump on an 02 F150, it just shuts off the injectors.
Do you get your two-second power feed at the inertia switch when the key is turned from OFF to RUN? If yes, then it's either a wiring harness fault (rearward) or a fuel pump problem. If no, then you'd have to back up in the circuit and check the fuel pump relay and its power feeds.
Do you get your two-second power feed at the inertia switch when the key is turned from OFF to RUN? If yes, then it's either a wiring harness fault (rearward) or a fuel pump problem. If no, then you'd have to back up in the circuit and check the fuel pump relay and its power feeds.
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No I did not check for that at the cut off. I will do that. I have access to all data so I will get a better wiring diagram so I can trace wires and feeds. I can do simple things in all data but alot is still more than my capability. Thank you for your help! I was just explaining to my painter that when someone comes in with a question about paint and body I answer it as if they need to know from the beginning with no experience. The information you have given me is greatly appreciated.
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found the problem right where you said it would be. Had power to the inertia switch so I traced wires and found a nasty connection. After cleaning and reconnecting worked like a champ. Thanks again for your help
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