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Super Duty & Heavy Duty 1999 to current Ford F250, F350, F450 and F550 Super Duty with diesel V8 and gas V8 and V10 engines SPONSORED BY:




 
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Old 10-21-2011, 02:35 AM
lllateralus lllateralus is offline
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7.3 Fuel sending unit fixed, not replaced...

Just thought i'd post this to possibly save someone out there a boat load of money like I did.

I almost went to the dealer and purchased a new fuel sending unit but decided to try something just for kicks, and boy am I glad I did.

First off, I posted a few days ago stating that I ran my truck out of fuel with the gauge showing 1/4 of a tank of fuel.
The sending unit had failed.

Today I dropped the tank, and just before running out and giving the stealership almost 500 bucks, I grabbed my can of "Mass Air Flow Sensor Cleaner" spray.
It is a high pressure spray can, similar to carb cleaner but I imagine, not NEARLY as harsh.

I sprayed tons of the stuff in and around the plastic sending unit sensor area where the fuel float up and down "action" takes place. (like the pivot point, where the sensor ITSELF is located)
I let the stuff dry fully, and started running some tests positioning the float wire in different positions and cycling the ignition, including at very low levels where the fuel light is ON, where it would not correctly indicate before.

I put her all back together and all seems normal.
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2003 F250 7.3 crew cab, 4x4, short bed, 4" lift, exhaust, intake, triple gauge pod, 45 gallon aux tank/diamond plate box, 35" BFG AT's

2001 F350 SRW 7.3 PSD, 4X4, crew cab, long bed, Banks Chip, Exhaust, gauges, trans command module, CLEEEAN *SOLD*
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Old 10-21-2011, 04:43 AM
BareBones BareBones is offline
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Very interesting, good to know. Thanks for posting!
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2005 F350 V10 6spd dually, 15K receiver. No 4WD, no LS, no A/C, no special cab - just a lean mean towing machine!
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Old 10-26-2011, 03:15 AM
lllateralus lllateralus is offline
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***UPDATE***

Well, it was reading accurately for about 4 days. This morning, I knew when I started the truck that I did not have as much fuel as the gauge was indicating. Dang it...

Well, looks like its time to drop the tank again and replace the sending unit.

My question is, why is the diesel sending unit 3 or 4 times the cost of the non-diesel unit? This little sending unit is nearly 400 bucks.

I simply cannot afford that right now.
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2003 F250 7.3 crew cab, 4x4, short bed, 4" lift, exhaust, intake, triple gauge pod, 45 gallon aux tank/diamond plate box, 35" BFG AT's

2001 F350 SRW 7.3 PSD, 4X4, crew cab, long bed, Banks Chip, Exhaust, gauges, trans command module, CLEEEAN *SOLD*
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Old 10-26-2011, 04:30 AM
BareBones BareBones is offline
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Bummer. Might see what a used one would cost at a junk yard...?
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2005 F350 V10 6spd dually, 15K receiver. No 4WD, no LS, no A/C, no special cab - just a lean mean towing machine!
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Old 10-26-2011, 04:30 AM
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1999, 2005, 97, 99, diesel, duty, f250, ford, fuel, powerstroke, removal, sending, super, unit, wire

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