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2000 Chevy Silverado

Tiny
SANDERS5813
  • MEMBER
  • 2000 CHEVROLET SILVERADO
  • V8
  • 4WD
  • AUTOMATIC
  • 151,000 MILES
I have a 2000 chevrolet 1500 z71 with 151000 miles on it and while im driving down the road around 50- 55 mph or while the rpm meter reads 1500. The rpm meter will jump up and down and the engine will rev up and down while im driving. This is making my gas milage go way down. Whats wrong with i?
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Friday, December 28th, 2007 AT 5:30 PM

2 Replies

Tiny
BLACKOP555
  • MECHANIC
  • 10,371 POSTS
Hows your throttle position sensor looking? Have it tested.

Also check your EGR valve to see if its plugged open or shut.
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Friday, December 28th, 2007 AT 7:56 PM
Tiny
DENNYP
  • MECHANIC
  • 1,823 POSTS
You might also have a transmission slipping in 4th gear.
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Saturday, December 29th, 2007 AT 4:06 PM

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