Quote Originally Posted by mluder View Post
So is the fix to replace the idle control computer?
It could be the ECU or the motor that's slow to react.
The ECUs are known problem areas. If you are handy with a soldering iron you can fix one yourself. I've fixed quite a few of them with great success. Total parts cost was about $5.
What you need to do is replace all ICs you can see in there, six in total.
three LM2902
one LM2901
one CD4066
one CD4027

It might be a good idea to replace electrolytic capacitors as they go bad with age.
You'll need:
one 100uF 40V
two 10uF 35V
one 47uF 10V
one 1uF 63V

If the motor is slow to react... I've heard someone spray some lubricant into the air channel to free up the rotor... I guess it's worth a try.
Either way, when running correctly your idle should not overshoot. After revving up and releasing the gas the idle should drop and just stop at idle without going under and then correcting.