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Posted on Jun 11, 2017
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2000 Pontiac Grand Prix GT...issue is with my gas guage, it "floats" instead of giving an accurate reading. It floats from full to empty and back, never settling on the actual fuel level. Is the fuel guage mecahnical or electrical? Also, have an indeterminate electrical problem. Drives no problem, but then suddenly tach dies and traction control light comes on, but car runs normally. If you turn the car off and restart it, the issue disaapears. Thanks!

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Richard Faber

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  • Pontiac Master 1,444 Answers
  • Posted on Jun 12, 2017
Richard Faber
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I can help you with the fuel gauge problem. Need to replace fuel sending unit. This is a resistor type. As the fuel level changes the resistance changes and sends the signal to the gauge.

Bogdan Odwazny

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  • Pontiac Master 6,171 Answers
  • Posted on Jun 12, 2017
Bogdan Odwazny
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Welcome Pontiac familyProblms and Problems, fuel level I think is not worthy of fixing, go with 300 km or 200M. then refill.Broken or ***** ABC wires.

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5 Related Answers

Anonymous

  • 67 Answers
  • Posted on Aug 27, 2008

SOURCE: check gauges light

Possible bad guage, bad wiring, or bad sending unit. Check each one independently of each other, start with wiring first, then sending unit.

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Anonymous

  • 1 Answer
  • Posted on Mar 11, 2009

SOURCE: 1999 Pontiac Grand Am Fuel Problems

The gas guage has a sending unit in the tank attached to the pump, there is a small circuit board on it that has smal"fingers" that send the signal to the guage.These get worn off and thus sends a false reading to the gas guage in the dash. The gas tank must be removed and a new unit put in to solve the problem. I had to do this repair to mine. As for the gas issue, just try pulling the nozzle back out of the filler neck when putting gas in, sometimes the overflow tube gets plugged up and won't allow the air to escape as the gas goes in the tank, making the gas pump think the car is full, pulling the nozzle will allow the air to escape. Hope this helps.

Jonah Oneal

  • 14092 Answers
  • Posted on May 14, 2009

SOURCE: 2002 Pontiag Grand Prix GT 3.8 Runing rough and stalling at stops

sound like vacuum leak or fuel pump problems.scan it to see if egr valve sticking open.

Anonymous

  • 3 Answers
  • Posted on Jul 22, 2009

SOURCE: abs and traction control light faults after a brake job. 2005 Pontiac grand prix

a quick test is to disconnect the sensor connector hook up and ohm meter to the sensor connector on the hub side not the engine side and spin the hub if the resistance rises and falls you're most likely ok if the resistance reads 0 or infinite you have found the bad sensor..this won't always be the case but it's a good start in the right direction

mlapres

Mike LaPres

  • 757 Answers
  • Posted on Dec 20, 2009

SOURCE: 2005 Pontiac Grand Prix Traction Control Problem

Also not coming to a complete stop before changing gears will cause that as well.

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The gas guage has a sending unit in the tank attached to the pump, there is a small circuit board on it that has smal"fingers" that send the signal to the guage.These get worn off and thus sends a false reading to the gas guage in the dash. The gas tank must be removed and a new unit put in to solve the problem. I had to do this repair to mine. As for the gas issue, just try pulling the nozzle back out of the filler neck when putting gas in, sometimes the overflow tube gets plugged up and won't allow the air to escape as the gas goes in the tank, making the gas pump think the car is full, pulling the nozzle will allow the air to escape. Hope this helps.
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