Air/Fuel Solenoid Valve Test

Warm engine to operating temperature and allow to idle. Connect dwell meter, set on 4-cylinder scale, between White check connector, pin No. 1. See Figure and ground. Verify dwell meter reads within 20-70 degree range. Connect a jumper wire between White check connector pin No. 1 and ground. If engine speed does not decrease, clean air/fuel solenoid valve or carburetor. Replace solenoid if necessary.

NOTE: DO NOT submerge air/fuel solenoid valve in cleaner. Spray with carburetor cleaner and blow out with compressed air. Air/fuel solenoid is not available separately. Replace as an assembly with air horn.