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1998 Chevrolet Silverado RPM

Tiny
JOHN2424
  • MEMBER
  • 1998 CHEVROLET SILVERADO
  • 5.7L
  • V8
  • 4WD
  • AUTOMATIC
  • 100,000 MILES
Engine can rev above 2000rpm in park but try to drive it. Truck will not go above 2000rpm Have changed throttle position sensor, fuel filter, cats, cap, rotor, plugs, wires, Truck just seems to fall on its face under load. It Runs perfect in park revs up no miss. Changed crank sensor as well. Hook Up scanner its says throttle sensor slow.
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Tuesday, December 17th, 2013 AT 2:40 PM

1 Reply

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Check hoses to map sensor for being soft if they are replace them. Checik under tbi unit for a vacuum leak back and front they like to blow there. Then check fuel pressure 9-11 psi.
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Tuesday, December 17th, 2013 AT 3:18 PM

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