Hi, the throttle body can get carbon build up, resulting in a low idle, or possible check engine light. The carbon build up can be cleaned. The most effective way, is to actually remove the throttle body, and clean the throttle plate, and air flow ports, with a good spray choke cleaner. This is available at an auto parts store. Once reassembled, the low idle situation will be resolved. Good luck...Coop
Try Carburetor cleaner.
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