Question about Cars & Trucks
My gas gauge sometimes get stuck on 3/4 tank for like 3 days...I can fill the tank and within 60 miles it would be on 3/4 tank and just stay there or it would go to E and stay there. If I face up hill the needle would move all the way to F and it would stay for a while on F and than it would be a little before E...what do I need to do?
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Posted on Jan 02, 2017
The fuel gauge utilizes a voltage stabilizer located on the back of the instrument cluster. if it's faulty it could cause this problem. The other causes are a wire fault (short) between the gauge and the tank sending unit and the sending unit itself being corroded and stuck in the full position (the float assembly that is). One way to quickly isolate (and maybe eliminate) the problem is to get a used cluster from a wrecking yard and swap it out. If it works normally, there you go... if not you will need to access the tank sending unit (this usually, but not always, involves draining and dropping the tank to get to it. Some cars have an access panel in the body over the fuel tank for this purpose... look under the carpeting in the rear of the vehicle) Once you have access disconnect the power wire (usually red or with a red stripe), and with the key on, the gauge should drop to empty. If it doesn't, the problem is not the sending unit. Hope this helps...;-)
Posted on Apr 14, 2009
The gauge circuit is shunted on most cars, this is wierd, but needed to stabilize the readings... Your description sounds like normal function. Drivers would complain if the qauge were to be instant, going around corners, starting, stopping, all move fuel, and the gauge would indicate this, cauing driver alarm...Been this way for ever, although yours sounds like it is on the far side of the scale...if it reads correctly after a while, you could replace everything and you would have the same performance.
Posted on Sep 07, 2009
Fairly common problem with GM vehicles. The sending unit in your tank has a small circuit board that an arm is attached to which moves up and down according to your fuel level. This circuit board and arm are not making good contact. Unfortunately the only good solution is to replace this part.
Posted on Oct 28, 2009
Testimonial: "thought probably that was it but better off replacing whole unit .i was for for gauge proplem thanks. "
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