folks, I'm stumped.

83 1.9 bare bones stock engine. Runs like a champ with ~22mph religiously. But at idle, it 'revs' or cycles rpm.

i've replaced (From a well running engine, or new at time)- both temp sensors, replaced and re-adjusted both throttle body position switches, ensured no leaks in the air intake (post AFM), replaced the idle controller (bypassed it too), inspected as many wires that i can get to, big honking grounds from head to block to head to tranny to body...

I think it is the throttle body stuff- maybe the wires? Anybody have suggestions, other than tracing the wires back to the ecu, and cutting and splicing?

Or suggestions of something else to look at / into?
thanks
matt

"may the four winds blow you safely home"