Fuel gauge is bouncing

BALLBALL

MEMBER
1991 CHEVROLET S-10
278,000 MILES

I am having problems with my 91 s10 2.8 fuel gauge not working how do I check the current going to or coming from fuel tank to gauge? I change sending units the gas hand will come down to half way then goes back up to pass full never drops down on empty?

4 Replies

HMAC300

MECHANIC
48,601 POSTS

Make sure there is good ground going to the sending unit. On the hot wire make sure it is a blinking light with a test light. It cold be hte gauge as well.

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Saturday, December 31st, 2011 AT 1:07 AM

BALLBALL

MEMBER
8 POSTS

Hy hmac300 ok how I find the hot side turn the switch on and when I get back there I guess I could just get the test light and stick into the wires so which ever 1 blink is gonna be the hot 1 rite also my wires going to the tank are all black and even coming from the truck are black also thanks

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Saturday, December 31st, 2011 AT 1:32 PM

HMAC300

MECHANIC
48,601 POSTS

It's the pink wire, if you can't see the color get soem choke cleaner and clean teh crap off of it so you can

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Saturday, December 31st, 2011 AT 3:22 PM

BALLBALL

MEMBER
8 POSTS

Ok I will do it tomorrow I notice when I unplug the tank sending unit wires it went back to full while I had the switch on then I turn the switch off and plug it back up and turn on the switch it went to half tank I no I dont have tht much gas in there I only put 5 gallons in there drove it 69 miles so I no it should be down a lil more

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Sunday, January 1st, 2012 AT 2:05 AM