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> gas gauge error, reads a couple of gallons low
JimN73
post Jun 8 2015, 02:44 PM
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The gas gauge used to read right, not anymore. When full, the reading is a little over 3/4. The gauge and the reserve light appear to be in sync, reading empty and coming on when there is about 4 gallons left.

I have verified that the resistance in the sending unit is within spec. I have no resistance between the tank connection and the ground. I have cleaned the connections on the tank, the gauge and the fuse.

Am I missing something or could there be a problem with the gauge?

Thanks
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Mike Bellis
post Jun 8 2015, 02:46 PM
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Have you measured voltage and resistance at the gauge? Or did you only test the sender? Bad connections and loos connections and corrosion are other factors in the wiriing.
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JimN73
post Jun 8 2015, 04:32 PM
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Mike, I only tested the sender and the wires to the sender and ground - for resistance.

Battery voltage (12 volts+) to the gauge? Where would the resistance check be?

thanks.
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Ferg
post Jun 8 2015, 04:38 PM
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Pull the sender on the tank. I've seen corrosion on the wires/rods keep the float from moving up and down freely. There is a pelican article on how to disassemble it to see.

http://www.pelicanparts.com/techarticles/9...der_replace.htm
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Dave_Darling
post Jun 8 2015, 04:51 PM
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If the reserve light is coming on with 4+ gallons in the tank (double-check that!!) then your float seems to not be floating so well. Might be time to replace it.

--DD
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forrestkhaag
post Jun 8 2015, 05:34 PM
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QUOTE(Dave_Darling @ Jun 8 2015, 03:51 PM) *

If the reserve light is coming on with 4+ gallons in the tank (double-check that!!) then your float seems to not be floating so well. Might be time to replace it.

--DD


or pop it open and carefully clean the trash out of the sender barrel then put it back together and check it out / sound like the same thing mine was doing before I can-opened it and cleaned the sliders and float action. All is well and works perfectly after a few delicate moments of cleaning with a Qtip glued to a clean chopstick and some Acetone to gently clense the wires therein.

In any case, it is worth a try before biting the bullet on a new sender.
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JimN73
post Jun 8 2015, 05:43 PM
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thanks, I see a busy day tomorrow.
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toolguy
post Jun 8 2015, 05:56 PM
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My daily driver does the same every 4-5 years. . the trouble is caused by deposits from today's crappy gas coating the windings of the sender. . the easy fix is to add Chevron Techrone injection cleaner to a FULL fillup. . May take 2 successive treatments but it works. .
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JimN73
post Jun 8 2015, 06:18 PM
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QUOTE(toolguy @ Jun 8 2015, 04:56 PM) *

My daily driver does the same every 4-5 years. . the trouble is caused by deposits from today's crappy gas coating the windings of the sender. . the easy fix is to add Chevron Techrone injection cleaner to a FULL fillup. . May take 2 successive treatments but it works. .


I'll try this first.
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AlanG
post Jun 8 2015, 06:19 PM
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QUOTE(Ferg @ Jun 8 2015, 06:38 PM) *

Pull the sender on the tank. I've seen corrosion on the wires/rods keep the float from moving up and down freely. There is a pelican article on how to disassemble it to see.

http://www.pelicanparts.com/techarticles/9...der_replace.htm



(IMG:style_emoticons/default/agree.gif) Been there. Done that. Got the t-shirt.
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JimN73
post Jun 9 2015, 11:13 AM
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QUOTE(toolguy @ Jun 8 2015, 04:56 PM) *

My daily driver does the same every 4-5 years. . the trouble is caused by deposits from today's crappy gas coating the windings of the sender. . the easy fix is to add Chevron Techrone injection cleaner to a FULL fillup. . May take 2 successive treatments but it works. .


One tank of gas, one bottle of techron, one mile of driving - one gauge that works. It's a murracle.

thanks, Toolguy
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ripper911
post Jun 9 2015, 11:45 AM
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