how do I lower the idle on a 86 astro van

Asked by Oct 16, 2017 at 02:01 PM about the 1986 Chevrolet Astro

Question type: Maintenance & Repair

3 Answers


How high is the idle?


Does your engine have fuel injection or a carb?


It's likely a throttle body, 4.3L, the throttle body gaskets can degrade and leak air into system causing high idle. I'd look for any vacuum leaks, a short blast of starter fluid near a suspect joint or crack can cause a tell-tale jump in idle. Fuel meter is another place to look if it's dumping excess fuel.

Your Answer


Looking for a Used Astro in your area?

CarGurus has 5 nationwide Astro listings and the tools to find you a great deal.

Postal Code:

Chevrolet Astro Experts

  • #1
  • #1
    Tom Demyan
  • #3
    John Saffrahn
View All

Related Models For Sale

Used Chevrolet Astro Cargo Van
6 listings starting at $4,990
Used GMC Safari
2 listings
Used Chevrolet Suburban
5 Great Deals out of 572 listings starting at $6,990
Used Chevrolet Blazer
16 listings starting at $3,295
Used Dodge Grand Caravan
235 Great Deals out of 10,270 listings starting at $3,495
Used Chevrolet Camaro
1,085 listings starting at $12,995

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.