My 2002 grand prix gt gas gauge doesnt always read properly, when i fill it up reads right, but always says full rare times while driving it will read correct, and after driving i put in park, and let idle it sometimes slowly goes down and jumps around what i assume is the right amount of gas. thanks
and one other problem, while driving sometimes not always, if not accelerating i hear a grinding noise noise under the hood, the car has 273km on it and ****** not the best. hope you can help thanks
Re: My 2002 grand prix gt gas gauge doesnt always read...
Replace the gas tank unit. 99 percent of the problems of this type require the tank unit to be replaced. it is a flaw with the GM cars, that GM refuses to have a recall on.
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if it worked for a short period of time after doing the pump/sending unit the check the connections going to the pump/sending unit they would have been moved around doing the pump
Dont we wish it be full all the time but gas in it. Okay for the sending unit reading full its getting a full ground reading,Key on engine off. does it move and goe down. It should if it doesnt the problems with the gauge itself. 2 test disconnect the wire harness, did the gauge go down. the problem will be in the sending unit can be a hung float(Rare).
the temperature sending unit on a 97 grand prix 3800 gt(which is also the coolant temperature sensor) is not accurate. the sending unit part of this sensor only sends info to the guage on the dash. the coolant sensor part sends info to the computer of the car. it is located under thermostat and somewhat difficult to get at. i had put a brand new one in and my temperature on my dash is all over the place---even with good thermostat and properly bled system. when i hook up a scanner to my computer, the coolant sensor is sending the computer(ecu??) what seems to be the right temp. anywhere from 194 degrees to 217 when hot. the guage however on dash go from 160 to 260 in less than 2 minutes.
The oil sending unit has gone bad and needs to be replaced. The sensor is under the exhaust manifold and above the oil filter on the V6. Replace the oil pressure sending unit, once they fail they may start to leak oil soon. Good luck and keep me posted.
Unfortunately this is most likely the fuel pump module, which includes the fuel level sensor also. This should be diagnosed more thoroughly with a scanner, a good scanner will be able to check instrument cluster separately to confirm the gage is working right,and check for trouble codes that may not light any warning lamps. Hope this helps. Rate me please.P.S. Dont use that fuel station any more.
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