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most new vehicles have a pump in the tank with the sending unit in there also, my guess would be the sending unit is out. the only way to fix it is pull the tank and replace it. If that is what you do i would replace the fuel pump also. If the sending unit went out the pump may be not too much farther behind. Does the gauge work at all , like if the car has 1/2 a tank does it register 1/2 a tank. Usually what happens is the sensor has a dead band usually when the vehicle is full the sensor reads empty but when the fuel goes down the sensor will start reading somewhat close.
signs of a bad fuel pressure regulator. the vehicle runs rough, the engine will not start usually in the mornings. many times engine starts but stalls shortly after starting. a bad regulator can result in fouled plugs. black soot on plugs, blake smoke from tailpipe, running rough, stalling. you could have residue in fuel tank and need to change fuel filter again. have a very good day !!
Yeah what's you saying is right, and GM is having a big problem with Fuel Pump on such model, I Already saw a 2 Year Cobalt with a Dead Fuel Pump.. ! Best thing is Keep your tank more than the Quarter, Buy a Dealer Fuel Pump not a Jobber one, be sure the strainer is clean in the tank and check if there's any dirt in your Fuel tank ! Check too if there's any Recall about that on your Vehicle !
Hi: Your Fuel Level Sending Unit That Is Located in Your Fuel Tank Is Probally Bad. BUT before you go to taking the Sending Unit out Of your Tank Check to see if ALL Connections To And From Tank to Gauge are Conected Good. Also You could have a Fuse that Goes to the Sending Unit,in Your Fuse Block.Check And See if You Have A Fuse Labeled Fuel Sending Unit or Fuel Sensor. If you end up Replacing The Fuel Tank Sending Unit Run Your Gas Tank Down To Almost Out Of Gas Before You Start to Remove The Metal Straps Holding Your Tank Up. Cause The Sending Unit Is on Top of Your Tank ,And Your Fuel Pump Is In The Gas Tank As Well. Hope This Has Helped You Please Send Me a Vote on How my Solutions Have Helped You And Also You Can Send Me A Testamony Thank You From the WYOCWBOY
Since the fuel pump is in the gas tank, your pump picked up debris, and dirt on the bottom of the tank and ran it into your fuel filter.
Replace fuel filter, and check fuel pump fuse.
Running your vehicle with less than a 1/4 tank of gas is hard on the pump, because the fuel pump uses gas to cool it.
Please let me know what you find.
turn the key to the on pos. and listen for a huming in the rear of the car as your fuel pump is in the tank. if you don't hear it then i would say that the pump is bad and need to be replace, but if you hear it it could be weak . try takeing off the air cleaner and spray some quick start down the intake and try starting it . if it start i would replace the pump . very easy to replace.