97 6 cyl, astro- got full tune up still idling rough at stops-like a truck. better in neutral while

Asked by vanski Sep 24, 2013 at 10:28 AM about the 1997 Chevrolet Astro Cargo

Question type: Maintenance & Repair

should I trust a gas additive or buy a sensor- the check engine light was on before my friend did full tune up-fuel ,filter-cap,wires,sparks,oil. added rear fluid. runs great open road? affraid of garages-have been sabatoged in past. Will be moving soon dont neeed van trouble- What eles should I do -heading up to mountain country. Thanks guys-Dee

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wlogan answered 11 years ago

check close for vacumn leak, iac valve ?

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AmmoGuy answered 11 years ago

!) Check for vacum leak. I had one @ PCV valve. 2) Throttle valve could be dirty/carboned -up. Make sure it is c-l-e-a-n!! Aim small, miss small.

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