Why does my Silverado turn off the fuel pump?
Why does my Silverado turn off the fuel pump?
So, my suspicions about the fuel pump were wrong! The found a stored P1626 code, which means there was a communication problem between the Theft Deterrent Module and the PCM. When it doesn’t receive the right password, it disables the fuel pump.
What should I do if my Silverado engine dies?
Update as of today: 1) the truck hasn’t started and kept running since last week. It only starts right up, then dies immediately. 2) I got a fuel pressure tester and the pressure is at 53 with key on, and maintains pressure when it starts (then dies).
Why does my GM Truck start then die?
He was thinking fuel pump or fuel filter. He was about to take it to a dealer to be checked out when someone told him to turn the key to the on position and leave it there until the dash lights went out then start the truck. He did this and says the truck is running fine now. It reset the security system.
What causes a car to start but not keep running?
The engine requires the right amount of air and fuel to mix together for ignition. If there is a fuel leak somewhere, then the correct amount of fuel may not make it to the combustion chamber. This might be enough to allow the engine to start, but not keep running.
So, my suspicions about the fuel pump were wrong! The found a stored P1626 code, which means there was a communication problem between the Theft Deterrent Module and the PCM. When it doesn’t receive the right password, it disables the fuel pump.
Update as of today: 1) the truck hasn’t started and kept running since last week. It only starts right up, then dies immediately. 2) I got a fuel pressure tester and the pressure is at 53 with key on, and maintains pressure when it starts (then dies).
He was thinking fuel pump or fuel filter. He was about to take it to a dealer to be checked out when someone told him to turn the key to the on position and leave it there until the dash lights went out then start the truck. He did this and says the truck is running fine now. It reset the security system.
What happens to the fuel pump when the engine starts?
The computer closes the fuel pump relay long enough to get fuel to the engine to start it. After the engine starts, oil pressure is supposed to build up and close the oil pressure switch. the fuel pump is then powered through the oil pressure switch and the computer opens the fuel pump relay.
