Under the dash, there was an adjustment on the gas pedal to give the throttle line more slack which let the throttle body close all the way.
If that does not work, you can try adjusting the throttle body by turning the big screw on the side in further.
Advanced timing can also cause high idle, check timing while you're at it.
Do Not PM me your technical questions. Post them in the forum!
My 1992 SOHC Turbo Hatch
My Youtube Channel: 6th Gear Garage

My 1992 SOHC Turbo Hatch
My Youtube Channel: 6th Gear Garage