Originally Posted by DazC
Start it up and disconnect the idle speed control valve........
Set the idle speed to 850-950rpm then reconnect the idle speed control valve and see what happens.....
Did you do this?
If the car is idling below 800rpm naturally with the idle valve disconnected then when you reconnect the vlave it will try and rev up on it's own then either hunt it's box off or rev up and cut out....
The base idle speed with out the valve connected needs to be about 850-900 rpm....