1989 Gmc C1500 Throttle Body Recently Started Idling Down Will Idle Real High

1989 GMC C1500
26,000 MILES
Avatar
CATHY PAYTON
  • MEMBER
  • 4 POSTS
I have throttle body. It has recently started idling up and down. Then it will idle real high like choke is sticking, but i thought throttle body didn't have a choke . It sometimes dies when put in gear and boggs down. Any suggestions?
Feb 9, 2013 at 5:30 PM
Advertisement
Avatar
MHPAUTOS
  • ✓Experienced Mechanic
  • 31,937 POSTS
Clean throttle body and IAC with throttle body cleaner and scan for any unresolved fault codes start here.
Feb 9, 2013 at 5:35 PM
Avatar
CATHY PAYTON
  • MEMBER
  • 4 POSTS
Already did that and replaced sensors,fuel filter,plugs and wires. Even took it to shop and they couldn't fix it . I'm stumped.
Feb 9, 2013 at 5:51 PM
Avatar
MHPAUTOS
  • ✓Experienced Mechanic
  • 31,937 POSTS
may be electrical, but i would base my checkes around the IAC have you tried a know good one as a test?
Feb 9, 2013 at 5:58 PM
Avatar
CATHY PAYTON
  • MEMBER
  • 4 POSTS
No. Sorry but whats the iac?
Feb 9, 2013 at 6:03 PM
Avatar
MHPAUTOS
  • ✓Experienced Mechanic
  • 31,937 POSTS
Idle air Control motor.
Feb 9, 2013 at 8:13 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.