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Tomjhall · 08-25-2014, 07:18 PM

All,

I purchased my coach over a year ago and the prior owner had purchased parts to replace but never got around to them. So I got boxes of new stuff! The problem was none of it fit. The oil sending unit he bought for $135 only had one lead, the temp sending unit was wrong, and now I finally got around to trying to fix the fuel sending unit.

I have done all of the tricks I've read about on this forum. The ground is good, I cleaned and re terminated all of the wires. So I opened up the brand new box for the fuel sending unit. I'm sure it was $$$$$ I compared it to the original and it's about a inch longer and hits the bottom of the tank....

Can it be shortened?

My recent effort seem to have made it a little more accurate but when I dipped the tank it showed lower than half a tank but the gauge shows higher that half. I will fill it up on Friday and maybe adjust the original one so that it's just on full.

Suggestions would be appreciated.

walt2137 · 08-25-2014, 08:32 PM

Good luck Tom , that fuel sender don't work wort a crap and I gave up long ago and just run by my Silverleaf info. Do a search on this forum and read about Silverleaf program I would not want to be without it.

Tomjhall · 08-27-2014, 09:34 PM

The SilverLeaf is on my list of things to get. I did however have good luck today working on the original sending unit. It read 100 ohms when removed Justine the brand new unit. I was checking the wires and they appeared to be in good shape but when I measured the ground I had some resistance and only 10 or 11 volts. So I cut the wires and determinate them. Big difference I had zero resistance to ground and 12.65 Volts. I also marked the fu level on the probe. I then measured the probe and it was about 21.5 inches long but I figured the distance to the filler neck compared to the probe have me about 20 inches of measurement. I the. Marked the probe at 1/4, 1/2, 3/4. I then he the probe in the fuel to the 1/4 and made a very slight adjustment. I then pulled it out to 1/8 and the gauge indicated 1/8 and the low fuel alarm came in. I had a little under 1/2 tank of fuel and the gauge also read correctly. I am filling up Friday and I'm hoping I get a good indication. The new fuel sending unit is about an inch too long but I know how to cut it down in case the original is flaky.

jwinston · 08-28-2014, 12:03 PM

3 weeks ago I replaced sending unit in 99 windsor. Mine was 1 inch to long so I shortened it . Talked to manufacturer and they stated that it will now reading lower than actual. Better than higher than actual. lol James

Tomjhall · 08-29-2014, 01:44 PM

Well Winston,

I did the same as you. After all my troubleshooting and figuring things out I ended up just cutting an inch of the new one.

I went to fuel up this morning and the original gauge was working perfect in the driveway, once I started driving it was back to the normal 3/4 mark and I knew from dipping the tank it was below 1/2.

So I cut an inch of and didn't mess with the empty adjustment and had to barely turn the full pot to be just on full. I will see how this next trip goes. I should have done this to start with, wasted a few hours on my knees. Lol