Engine shuts off while driving or idling

Tiny
CALVIN GUY
  • MEMBER
  • 1999 CHEVROLET TAHOE
  • 5.7L
  • V8
  • 4WD
  • AUTOMATIC
  • 190,360 MILES
Engine starts up fine and drives usually two or three miles. Other times are they get only a couple blocks and the engine wants to start trying to shut down cruising along at 40 miles per hour especially at traffic lights and when letting off the gas to make a turn. I can usually keep it running by pumping the gas you can hear the engine choking and cutting out the gas will catch and take off running usually keep it running by it giving it gas while braking. But it has shut off while the engine is revved up and when it does quit on me at the holder gas pedal to the floor to get it to start back up and it usually starts back up, but sometimes takes a little bit to get it started. When it does start up the engine will rev up real high for 30 seconds or so and after it does shut off. Once I get it running when I put it in gear to try to take off stutters and shuts off. Sometimes I can pump the gas pedal and get it going right. Now just drive across town to work and back home afraid to drive it out of town. When it's not wanting to shut off it runs fine have no complaints.
Tuesday, January 12th, 2021 AT 9:38 AM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,771 POSTS
This sounds like a fuel pump or the crankshaft angle sensor has gone out. When you turn the key to the on position without cranking the engine over can you hear the fuel pump run in the tank for 5 seconds? We should run the codes to see what's going on.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

and

https://www.2carpros.com/articles/car-cranks-but-wont-start

and

https://youtu.be/sKo7xRWVNqY

Here is how to change out the fuel pump and crankshaft sensor. The fuel pump failure is very common. Check out the diagrams (below). Let us know what happens and please upload pictures or videos of the problem.

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Wednesday, January 13th, 2021 AT 10:04 AM

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