Do not adjust the throttle stop screw. It is installed at the factory.
1. Disconnect the throttle angle sensor connector.
Accord 1985
2. Measure the resistance between the yellow and green sensor terminals. The resistance should be 3.2-7.2 kOhm.
Accord 1985-86 and Prelude 1986-89
3. Measure the impedance between the yellow/white and green/white sensor terminals. The resistance should be 4-6 kOhm.