2000 Chevy Silverado

2000 CHEVROLET SILVERADO
151,000 MILES • V8 • 4WD • AUTOMATIC
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SANDERS5813
  • MEMBER
  • 1 POST
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?
Dec 28, 2007 at 9:30 AM
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BLACKOP555
  • ✓Experienced Mechanic
  • 10,386 POSTS
hows your throttle position sensor looking? have it tested.

also check your EGR valve to see if its plugged open or shut.
Dec 28, 2007 at 11:56 AM
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DENNYP
  • ✓Experienced Mechanic
  • 1,824 POSTS
you might also have a transmission slipping in 4th gear.
Dec 29, 2007 at 8:06 AM
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