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Re: intermitent fuel gage 05 malibu
Since the sender uses the same ground as the fuel pump the car would not run if the ground was the problem, the sender is the problem, a very common one at that, seems to be caused by the chemicals in today's clean burn reformulated fuel.
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Usually you will have a bad ground or a bad fuel level float which are with the pump located in the tank, if your not capable of major repair I suggest you find a repair shop. Part $100 but labor could be up to $500
Had the same problem with my 05 malibu. Change your fuel pump cus the pump, fuel filter and fuel gauge sending unit are all one piece. A good indication is that after fueling the gauge will go to full, drive 2-5 miles and drops to empty. If the gauge is totaly unresponsive, check the ground.
If it's all the way down the wire to the tank is broken somewhere and as long as the temperture gagfe is working it's getting power because the two gages share the same power supply. find the wire going to the tank and groung it and the gage ( with the key on) will go to full. If it does find where the wire connects to the top of the tank and clean the connection the other wire is the ground wire check and see that where it goes to is connected to a good ground if it all cheaks out you can put an OHM meter on the place on the tank the wire connects too and check to see if it has any OHMs to ground if it's wide open ( infinate OHMs ( no connection)) thenm the sending unit is bad and needs to be replaced. In these days of high gas prices gas is being stolen and ramming a hose down in the tank to get it can break the sending unit knock off the float arm or just bend it enouth so it stays down. find where you can get one and it they'll let you retrun ity without installing it buy it. Take it home remove your tank and then the sending unit and reconnect itto its wires and work the float up and down to see what the gauge does. Most of the time the float is damged so you can tell what's wrong with it and either put it back together or bend it back straight. if it's broken bad try the new one and if it works good put it in the tank and reinstall the tank. It's berst to do this work with the tank near empty as yopu haven't a gauge fill it and drive it about 150 miles to get it low on fuel or drain it so the tank will be light enough to handle as you remove it. Be careful about spills and figure what would happen in a spill or a fire so pick your work asrea carefully and have a least one helper to get you out if theres troble. ( Or hire the work done.)
Hi, the problem is in the sending unit located at your gas tank. I believe it is on the top of your tank, and you will need to remove either the rear seat to get to it, or what ever is directly over the tank. It may have a bad wire connection at the float assembly and sending unit that tells your gauge the amount of fuel is in the tank. If you are not sure, pick up a manual at any auto parts store, Chiltons, Haynes which will guide you through it.Your gauge is OK, it will be the sending unit that tells the gauge. I wish you the best on this, Shastalaker7
To be sure that the sending unit is bad,you need to locate the fuel pump connector and make some tests,first find a wiring diagram and see if the sending unit sends ground to the gage,idientified the cable and put ground or power depending what it works whit and see if the gage moves correctly if it does change the sending unit.If you had tell me what car are you talking where more helpfull for me to give you more accurate information.
its a problem with your sending unit most likly. its in your gas tank and tells your gauge how much gas is in your tank. I had a chevy truck and a blazer and both of them had this problem. I believe its a problem with all chevy models in my opinon. I would most definatly say that its your sending unit.
have you tried working on one problem at a time? have you check the body computer for any codes? and to also verify the bus line is ok. if you find nothing wrong with BCM or bus, try checking the speed sensor for an output signal or if the gear is bad.