Originally Posted by
CFI
Well the problem is back but I’ve found (hopefully?) the answer:
the throttle is sticking and not activating the idle micro switch.
I had tested this several times with the engine not running and it always check out fine. I could hear the click from the switch every time I let my foot off the gas pedal. Well today it acted up (2,500 RPM in park, no lower than about 1,700 in Drive) and I pulled over, popped the engine cover, and pressed on the idle micro switch. Immediately the idle dropped way down. Took my finger off, idle surged back up.
So, I’m going to try just lubing the cable, spool, spring, etc before I make any adjustments. Any recommendations for lube?