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Ron
Ron, ASE Certified Technician
Category: Ford
Satisfied Customers: 33423
Experience:  23 years with Ford specializing in drivability and electrical and AC. Ford certs and ASE Certs
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F450 SUPERDUTY 5.4L DIESEL. INSTALL NEW FUEL SENDER AND DO

Customer Question

F450 SUPERDUTY 5.4L DIESEL. INSTALL NEW FUEL SENDER AND DO NOT MARK FUEL LEVEL
JA: Has the vehicle turned into a gas hog? And how does it start -- same as usual?
Customer: IS RUNNING GOOD
JA: What is the model/year of your Ford?
Customer: 2008 FORD F450 SUPERDUTY 5.4L DIESEL
JA: Are you hoping to fix this yourself? What have you tried so far?
Customer: CHECK THE FUSES, ALL GOOD. NEED TO KNOW IF THERE IS ANY RELAY
JA: Anything else you think the mechanic should know?
Customer: WHAT IS THE NORMAL POWER READING TO SENDER
Submitted: 4 months ago.
Category: Ford
Customer: replied 4 months ago.
I NEED DIAGRAM FOR FUEL SYSTEM
Expert:  Ron replied 4 months ago.

Hello, my name is ***** ***** I am a professional here at Justanswer. Thank you for your question and I will assist you with your concern.

Are you needing the wiring for the fuel gauge?

Customer: replied 4 months ago.
MY MECHANIC SAYS HE NEEDS THE WHOLE DIAGRAM FOR FUEL SYSTEM. WE INSTALL NEW FUEL SENDER AND STILL NOT READING.
Expert:  Ron replied 4 months ago.

Okay , I have enclosed the fuel system wiring diagram for your F 450 in the link below. Have a look at it and see if this is what your needing. Post back if you have more questions and or need more help.

https://dl.dropboxusercontent.com/u/104923897/Fuel%20sender%20Aug%206.pdf

Customer: replied 4 months ago.
I WILL CHECK , THANKS RON .
Expert:  Ron replied 4 months ago.

Your very welcome and thank you as well. Please take a moment to rate my service so I can get credit for my time, the question remains open for follow up even after doing so, all you need to do is return to this question if need be.

Thank you again.

Customer: replied 4 months ago.
DO YOU HAVE THE DIAGRAM FOR THE FUEL GAUGE ONLY
Customer: replied 4 months ago.
MECHANIC JUST TOLD ME ENGINE IS 6.4 L
Expert:  Ron replied 4 months ago.

Yes the diagram is for the cluster and the gauge assembly and it is the diagram for the 6.4 as well.

Customer: replied 4 months ago.
IF THE SENSORS ARE BAD WILL THAT CAUSE GAUGE NOT TO WORK ?
I JUST NEED TO KNOW WHAT TO DO TO FIX PROBLEM
Expert:  Ron replied 4 months ago.

If both where bad it could but its not likely both would fail at the same time , what type of problem are you having?

Customer: replied 4 months ago.
MECHANIC TELLING ME THIS ONE DOESN'T HAVE THE SENSORS.
JUST TO SEE IF YOU RAN TO THIS SITUATION BEFORE AND KNOW WHAT TO DO TO RESOLVE
Expert:  Ron replied 4 months ago.

All Fuel tanks have a fuel level sending unit including yours, are you sure this guy knows what hes doing. If your gauge is not reading off of both tanks then I would suspect you may have a bad instrument cluster. Has he scanned the computer system to see what the fault code is that should be setting if the gauge is not working?

Customer: replied 4 months ago.
It has only 1 tank, no computer.
He thinks is a relay. But doesn't know where it is. He is checking by engine side relays
Expert:  Ron replied 4 months ago.

He is wrong, there is no relay , have him run the sending unit test if hes not able to scan the computer system, see the test steps in the link below. If the new sender and the wiring check okay the the problem is with your cluster.

https://dl.dropboxusercontent.com/u/104923897/Sender%20AUg%206.pdf

Expert:  Ron replied 4 months ago.

have hin do this testing.