Fuel Delivery Module(fuel pumps, sender and pressure sensor)

[GT@50]

I came across 2 Ford tools to remove unit from tank, 310-065 and 310-075. Are either of these correct? If not I'll get rid of them.

 

[GT@50]

Dang. Ford says its Rotunda # 310-123

 

[nota4re]

We have done many fuel pump replacements - never have needed a tool. I'd be surprise if any of the tools would actually work because the access hole is offset rather significantly from the retaining ring. A flat blade screwdriver and some gentle tapping works fine, IMHO.

 

[GT@50]

Screwdriver/FDM retainer removal tool/prybar, 1/2 ratchet/hammer. I love multi use tools.
Have you ever seen a bad sending unit?

 

[nota4re]

Have you ever seen a bad sending unit?

Never. You do know it's nothing like a traditional sending unit, right? There are no moving parts to wear out. What are the symptoms?

 

[GT@50]

Never. You do know it's nothing like a traditional sending unit, right? There are no moving parts to wear out. What are the symptoms?

Gauge is stuck at low. He said a Ford tech diagnosed a bad sender. I told him I'd have to verify before pulling it because I suspect it's a gauge issue. Easy enough to check at the connector in passenger footwell. At least that's where the drawings look like it's at. He already installed Speedhuts but maybe there's a bad connection back there. I'll get it in next dry day around here(WA).

 

[PeteK]

Kendall, is the fuel sender a capacitive sensing unit?

 

[GT@50]

It's 3 wires so I'm guessing it's a hall effect sensor. That said, it would have a moving part, the float. Also aligns with what GT101 said about a piece that fell off in the tank and bound it up. Is the disc the float, or rotated by a float?

 

[nota4re]

It's sonar if I'm not mistaken. There's no float.

 

[HighHP]

My fuel gauge is stuck at 3/4. I just keep track of how far I can safely go on the trip odometer. I did goof once and filled it with a little over 16 gals. I did not run out, but the check gauge light did come on. I did not know why it came on, since all gauges looked good, except the stuck fuel gauge at 3/4. When I filled it with 16+ gal, I assumed the check gauge light was due to low fuel. So I assume the tank sensor is working fine.

 

[PeteK]

It's sonar if I'm not mistaken. There's no float.

That sounds likely. A Hall effect sensor would require rapid movement between parts. That's why it works as a timing position sensor on a flywheel or in a distributor.

 

[nota4re]

My fuel gauge is stuck at 3/4. I just keep track of how far I can safely go on the trip odometer. I did goof once and filled it with a little over 16 gals. I did not run out, but the check gauge light did come on. I did not know why it came on, since all gauges looked good, except the stuck fuel gauge at 3/4. When I filled it with 16+ gal, I assumed the check gauge light was due to low fuel. So I assume the tank sensor is working fine.

Yep, a bad gauge. The gauge control module is getting the correct signal from the sending unit but the gauge is physically unable to represent the value. Simply replace the fuel gauge with the identical (looking) gauge from Autometer. I may have one in stock... lemme know if you want me to go gauge hunting through my move boxes.

 

[GT@50]

What is the disc? Any pics of the assembly?

 

[Gene Cassone]

Replace all the other small gauges with the updated autometer replacements while you are there. Especially if you doing the job yourself. Removing the dash faceplate is tricky if you have not done it before! See elaborate posts elsewhere on how to do it!!

 

[GT@50]

Replace all the other small gauges with the updated autometer replacements while you are there. Especially if you doing the job yourself. Removing the dash faceplate is tricky if you have not done it before! See elaborate posts elsewhere on how to do it!!

He said they're all Speedhuts already. He's going to wait until Spring to resolve this. I'll post remedy when we do.