1989 Chevy Astro high idle

1989 CHEVROLET ASTRO
Avatar
HAGGEN 2
  • MEMBER
  • 3 POSTS
Engine Mechanical problem
1989 Chevy Astro 6 cyl Two Wheel Drive Automatic

hi. My astro has high idle speed RPM ca.2000, how can I reduce speed.
regards ernst
Jun 9, 2010 at 5:10 AM
Advertisement
Avatar
INTERNETMECHANIC
  • ✓Experienced Mechanic
  • 700 POSTS
Possibilities, the throttle is stuck open-- the iac has a problem-- vacuum leak-- other. Check you mil codes, see if anything shows-up.
Jun 9, 2010 at 5:42 AM
Avatar
HAGGEN 2
  • MEMBER
  • 3 POSTS
[quote:5834ad72af="internetmechanic"]Possibilities, the throttle is stuck open-- the iac has a problem-- vacuum leak-- other. Check you mil codes, see if anything shows-up.[/quote:5834ad72af]
Jun 9, 2010 at 6:27 AM
Avatar
HAGGEN 2
  • MEMBER
  • 3 POSTS
[quote:9bf388b7da="internetmechanic"]Possibilities, the throttle is stuck open-- the iac has a problem-- vacuum leak-- other. Check you mil codes, see if anything shows-up.[/quote:9bf388b7da]

The IAC is new and I have tested codes they are ok.
Jun 9, 2010 at 6:31 AM
Avatar
INTERNETMECHANIC
  • ✓Experienced Mechanic
  • 700 POSTS
Are the throttle-body passages clean? If everything else checks ok, if it isn't a vacuum leak, I don't know. I may be barking up the wrong tree, I found this info?


https://images.2carpros.com/forum/automotive_pictures/512072_idle_speed_error_1_1.jpg


https://images.2carpros.com/forum/automotive_pictures/512072_idle_speed_error_2_1.jpg

Jun 9, 2010 at 6:49 AM
🔧 Tools & Auto Repair Parts
Find automotive tools, diagnostic equipment, and replacement parts for your next repair.
Shop on Amazon →
Paid affiliate link. As an Amazon Associate, we earn from qualifying purchases.
Add a reply
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 new question

Frequently Asked Problems for This Vehicle