Question about 1999 Chevrolet Tahoe

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I have a 00 Chevy Tahoe and it runs good but it seems like my fuel pump stops pumping when i stop.

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The fuel filter may have gotten to the end of it's life and needs to be replaced, the fuel pump to may be at the end of it's life also and may need to be replaced, or there is a problem with the SEFI system (fuel injectors), but start with the simple for now. Replace the Fuel filter since they should be replaced every 30,000 miles or once a year. If you can lone out a fuel pressure gauge,check the fuel pressure at the shredder valve and the readings with the ignition on the run position engine not running should be 60 to 65psi and will drop about 5 psi when the engine is running, any lower readings would call for the replacement of the fuel pump. Also check the fuses to make sure any of the fuse to the ecm and fuel pump has not blown and needs to be replaced, which also make me wonder if there is 13.5 votls from the battery when the engine is running, if the volts drop to 10.5 the engine will stall and it's also been know that 11.0 volts may not be enough for the fuel pump to run 60 psi with a dirty fuel filter. Good luck and hope this helps. So recap friend, replace the fuel filter and check the fuel pressure, if the pressure is not enough,then replace the fuel filter and fuel pump by dropping the gas tank to get to the fuel pump and don't forget to replace the wire harness to the fuel pump since there is a good chance that wires are going to break and give you problems in the future after replacing the fuel pump. Good luck and hope this helps and the SEFI is good.

Posted on Jul 11, 2009

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