high idle?

2002 CHEVROLET S-10
250,000 MILES • 4.3L • V6 • 4WD • AUTOMATIC
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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MARKRIOJAS968
  • MEMBER
  • 7 POSTS
When i hook up vacuum line from TBI to PVC valve truck runs at a high idle.
Jan 20, 2021 at 7:33 PM (Merged)
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ASEMASTER6371
  • CAR REPAIR CONTRIBUTOR
  • 52,796 POSTS
Good morning.

Have you replaced the PCV valve? its job is to remove vapors from the crankcase and send them back into the intake system. if the valve is stuck open it will do this.

Roy
Jan 20, 2021 at 7:33 PM (Merged)
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