I just replaced my throttle body on my 86 Civic SI. I had to replace it because my throttle angle sensor was missing and its not a replaceable part.
Anyways... I have hooked everything back up and it runs ok except after it warms up and the fast idle drops to normal it surges from 800 to about 1500 rpm. I have checked my vac hoses and they are all hooked up and look ok. I am wondering is this a symptom of a bad throttle angle sensor?? It didn't do it before I put the new throtte body on and my ECU code for it is gone now.

Any ideas??

Muddy