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1986 Ford Ranger V6 EFI
I am experiencing a high idle when in neutral. I have replaced all the sensors called out. It runs fine except when stopped at a stop sign then it idles very high. I ran fine for a few days then started idling high in neutral or when stopped at a stop sign.
Try taking the throttle body off and cleaning it. Also clean out the idle bypass solenoid, which is mounted to the throttle body. This stuff gets gummed up after awhile.