2003 GMC Savana High Engine Idle

2003 GMC SAVANA
135,000 MILES • V8 • 2WD • AUTOMATIC
Avatar
RAY967
  • MEMBER
  • 1 POST
This is a G3500 Savannah van. It has an irregular high idle problem. Cleaned the idle control value and it was fine for a while. After doing this several time, finally replaced the entire throttle body. It may do fine for a couple of days, then the problem comes back. Will do it for a while, then be fine again for no apparent reason. The engine being hot or cold doesn't seem to matter. It may do it when first cranked in the morning, or may start when stopping at a stop sign. Any ideas?
Aug 8, 2010 at 8:23 PM
Advertisement
Avatar
RASMATAZ
  • ✓ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
Inspect and test the throttle position and mass airflow sensors-might want to check the accelerator linkage/cable for kinked/sticking/binding?????
Aug 8, 2010 at 8:59 PM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
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.