1989 Chevrolet Silverado TBI

1989 CHEVROLET SILVERADO
200,000 MILES • 5.7L • V8 • 2WD • AUTOMATIC
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66MALIBUJOE
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  • 2 POSTS
Rebuilt Throttle body now has fast idle 2500-3000 rpm replaced Idle Air Control Valve
still fast idle HELP
Mar 17, 2015 at 9:33 AM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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JACOBANDNICKOLAS
  • AUTOMOTIVE REPAIR CONTRIBUTOR
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Have you checked for vacuum leaks? Have you checked for trouble codes? Have you checked fuel pump pressure?
Mar 17, 2015 at 6:27 PM
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66MALIBUJOE
  • MEMBER
  • 2 POSTS
No vacuum leaks. Fuel Pressure at 11 psi. No codes since rebuild of throttle body
Mar 26, 2015 at 11:02 AM
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JACOBANDNICKOLAS
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 110,190 POSTS
What codes were there prior to the repair? Also, these engines are know for intake leaks. Are you certain there is no problem there? Also, have you checked the EGR operation?
Mar 26, 2015 at 6:54 PM