90 GMC SEARRIA

  • Tiny
  • tkdmiller
  • 1990 GMC Truck
  • V8
  • 4WD
  • automatic
  • 199,800 miles

My truck shaking while idling seems to loose power?

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Thursday, December 16th, 2010 AT 10:06 PM

3 Replies

  • Tiny
  • rasmataz
  • Member

Do you have a check engine light? Don't recall last tune -up start here and see what happens

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Thursday, December 16th, 2010 AT 10:10 PM
  • Tiny
  • tkdmiller
  • Member

I just had the spark plugs replaced, new spark plug wires, new fuel pump. I had this issue before I had all this done. Thought that fixed it. The shaking comes and goes. When I rev it up it seems to go away. It happens when I come to a stop and is slow to take off but runs fine once I get it going. Could it be the transmission?

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Thursday, December 16th, 2010 AT 10:37 PM
  • Tiny
  • rasmataz
  • Member

Check and test the throttle position and manifold absolute pressure sensors-also the EGR valve

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Thursday, December 16th, 2010 AT 11:01 PM

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