1991 Buick Century iac mtr

1991 BUICK CENTURY
100,000 MILES • 6 CYL • FWD • AUTOMATIC
Avatar
TCAT551
  • MEMBER
  • 1 POST
after installing the i a c soleniod the car idles very high
[aprox 2100 rpm] the instuctions included with the part
stated to start the engine let run 1 minute then shut off
so the ecm can reset the soleniod i have done that several times and the idle is still high any sugestions?
Aug 7, 2009 at 9:19 PM
Advertisement
Avatar
BLUELIGHTNIN6
  • ✓ASE Certified Mechanic
  • 16,542 POSTS
  • ASE Certified Mechanic
you need a scanner to ensure IAC counts are correct ( 10 - 20) . connect scanner to ALDL test connector located under driver's side of dash. start and run engine to normal operating temp. observe the IAC counts. if counts are less than 10 or more than 20 then you need to adjust the idle stop screw
Aug 7, 2009 at 9:30 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.