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1998 GMC Jimmy engine knocking

Tiny
HUSKERGUY36
  • MEMBER
  • 1998 GMC JIMMY
  • 4.6L
  • 4 CYL
  • 4WD
  • AUTOMATIC
  • 195,888 MILES
When I start the Jimmy a knocking noise is present when u Rev up the engine it gets louder and faster when at idle it stays the same knocking pace gets faster as you Rev up the engine could u help me to know what this is please and thank you
Friday, July 17th, 2015 AT 5:21 AM

1 Reply

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
It may be a rod knock have a local pro listen but from your description that is what it sounds like. If you pull plug wire one at a time and knocking stops then that is the cylinder that is the problem.
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Friday, July 17th, 2015 AT 5:58 AM

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