Sputtering on take off

1998 GMC SIERRA
90,493 MILES • 4.7L • V8 • RWD • AUTOMATIC
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DYLAN MIKEL PAVKA
  • MEMBER
  • 1 POST
it runs fine when going down the road however if it sits for a while (like more than five minutes) or if I even sit at a light for more than just a couple minutes it sputters and sounds like it is going to stall. What could this be?
Jun 20, 2017 at 7:56 PM
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STRAILER
  • ✓Experienced Mechanic
  • 55,051 POSTS
Hello,

It sounds like it could be one of a couple things. First can for vacuum leaks.

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

and then I would change the spark plugs and wires for new

https://www.2carpros.com/articles/how-to-tune-up-a-car-engine

and finally the mass air flow sensor can be out of range but not setting a code.

https://www.2carpros.com/articles/how-to-replace-a-mass-air-flow-sensor-maf

Please run some tests and get back to us so we can continue helping you.

Cheers, Ken
Jun 23, 2017 at 4:42 AM
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