how do I lower the idle on a 86 astro van
Asked by Robbelotti Oct 16, 2017 at 02:01 PM about the 1986 Chevrolet Astro
Question type: Maintenance & Repair
3 Answers
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.