Engine is running extremely rough

1997 GMC YUKON
183,602 MILES • 7.1L • V6 • 2WD • AUTOMATIC
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LUVDBY1TOOMANY
  • MEMBER
  • 1 POST
Last night ran completely out of gas. Put approximately one and half gallons of gas into tank that did contain rust particles and now vehicle is experiencing low compression, knocking, major vibrations and the check engine soon light is on. What should I do? Can someone please help me?
Aug 11, 2017 at 12:25 PM
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STRAILER
  • ✓Experienced Mechanic
  • 55,694 POSTS
Hello,

I think the low compression is telling us the engine has had some kind of mechanical breakdown. Here is a guide that will help you find the cause.

https://www.2carpros.com/articles/the-reasons-for-low-compression

Please let us know what happens.

Cheers, Ken
Aug 14, 2017 at 6:57 AM
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