Stock Fuel Gauge Ohm Range Isspro sender - Ford Powerstroke Diesel Forum
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Old 05-10-2008, 09:41 AM
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Stock Fuel Gauge Ohm Range Isspro sender

I need help with wiring up a Isspro sender to my 2003 PSD stock fuel gauge. I tried using the 2 wires that cam out of the stock sending unit and either one works. Anyone know what the stock ohm readings are for my year truck? I'm got dual tanks and a Pollak 6 port.
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Old 05-16-2008, 05:29 AM
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I think the range is 15 ohms at empty and 165 ohms at full.
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Old 05-16-2008, 10:08 AM
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You are right about that. I just got my service manual cd to work and confirmed it. The yel/white stripe wire is the signal and black/orange stripe is ground. This can be found along side the frame rail in the harness loom.
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Old 05-16-2008, 01:29 PM
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I need to work on mine, my fuel gauge has been stuck at full for two months now.

any ideas?
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Old 05-16-2008, 08:52 PM
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Unfortunately the only thing you can do is take the sender out of the tank and put a ohm meter to it. Should read 15 empty when you let the arm drop and 165 ohms when you lift the arm up on the sender. If you were running BIO in it most likely that caused the sender to get stuck or fail. The dealer has a scanner that they can dial in all the ohm ranges to check for a bad sender without dropping the tank. Dropping the tank is really not that bad. There's just 2 bolts that hold it into place. It makes it a lot easier if you run your tank of fuel down to the lowest level possible.

The reason why I'm using a Isspro tube style sender is that they tend to work good for BIO and WVO.
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Old 05-17-2008, 03:54 AM
Let's go B's!!!!

 

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I'm not running Bio. I don't know what caused it. It happened when I went to the track. I made 8 1/4 m. runs, and on the way home, the thing was stuck at full for the first time, and has been there since. Needle drops down when off, but then when I turn it back on...back to full.

I kinda figured I was going to pull the tank, just too lazy to do it these days.

I was hoping that the float was stuck and would have fixed itself by now, but no such luck.
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Old 05-17-2008, 09:21 AM
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You said it "lazy" sometimes I get that way too. But I find it a lot less stressful spending 1 hr of my time to fix the problem and not have to worry about it. Trust me you'll feel 100 times better when you fix the problem yourself. You'll pat yourself on the shoulder and say I did it!
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