Question about 1998 Pontiac Grand Prix

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Gas had moving from full to empty after i fill up

I have a 2006 grand prix and my gas hand move all the time even when the tank is full the low fuel light come on too

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Sending unit in tank may be shorting out or the wire to tank is shorting try removing plug connection and applying some electrical cleaner and plug in and remove 4 or 5 times to clean plug contacts they may be dirty worst case replace sending unit in tank.

Posted on Jul 01, 2009

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Posted on Jan 02, 2017

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Hi Jennifer-
I believe I may be able to help you with the gas spillage you are having when filling the tank. This happened on my 1998 Toyota Camry.
One day, even though I was low on fuel, the attendant had trouble adding gas to my tank. Gas would spill during filling or the nozzle would click off (as though it was full) even though it was not. I had to stand there myself and slowly add gas until the tank was full.
I learned that my car had a thin vent tube that would run from the gas tank to the gas tank opening. As gas is rushing into the tank during filling, the air that is being displaced from the gas tank escapes through this tube. This tube had rusted closed a bit and was restricting the air flow escaping from the tank during pumping causing the problems I described. Once this tube was replaced, my problem was solved!
Hope this helps!

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I filled my gas tank with regular gas and 5 mins later the check engine light came on and the low fuel light came on. I turned the car off and let it sit for an hour. I made sure the gas cap was on...


Im faily certain you have a problem with your fuel sending unit. Im not sure how common that is with Chevy Malibus but i replaced that in my 98 jeep cherokee and that did the trick.

Dec 21, 2010 | 2006 Chevrolet Malibu

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fuel levle sensor in the gas tank needs to either clean or replaced.you will need to remove gas pump unit.

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1992


If you remove the sending unit in the gas tank, move it manually by hand as u saw done earlier, the gauge on the dash should also move. As long as the sending unit in the tank isn't 'stuck' at the half full level, the gauge should register empty to full as it moves. To be honest, I'm not sure if I would bother taking the sending unit out. 1st, u must be very careful not to blow yourself up when working on the gas tank (no sparks, etc), all u really need to do is fill up your car, see how many miles a tank of gas will go (carry a can of gas with u to see how many miles before u run out). If it's 350 miles, just set the trip gauge to zero every time u fill up, and get gas every 300 miles so u don't run out. If the sending unit moves freely, everything (wiring ) is connected properly, then it probably is the fuel gauge. good luck!

Oct 18, 2008 | 1992 Honda Accord

1 Answer

Fuel gauge moves back and forth from full to empty


you have a bad sending unit inside your tank.
the resistance of the potentiometer inside is broke on the half tank part.

you have to replace it.

tnx 4 using fixya.

drcool

Oct 05, 2008 | 2004 Pontiac Grand Prix

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