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Engine cranks but does not start?

Tiny
PRICHIE
  • MEMBER
  • 1998 GMC YUKON
  • 5.7L
  • V8
  • 4WD
  • AUTOMATIC
  • 150,000 MILES
Hasn't started in several days, has spark but it's weak. Fuel pump, filter and line are good, but seems to not get as much gas to the throttle body. The distributor seems to be in good condition, and while trying to get it to start, it developed a back fire.
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Thursday, December 29th, 2022 AT 9:36 AM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,526 POSTS
We need to fix the weak spark first which can be caused by a bad ignition coil. here is the location and how to change it out in the images below. Once the coil is replaced, see if the engine will start on starting fluid if it will not run on its own. You may have a bad spider injector which is common on these engines. This guide can help as well:

https://www.2carpros.com/articles/car-not-running-advanced

Check out the images (below). Please let us know what happens.
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Thursday, December 29th, 2022 AT 2:25 PM

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