PL720 4WD L4-2389cc 2.4L SOHC (Z24) (1983)
Deceleration Valve: Testing and Inspection
Anti-Backfire Valve
1. With engine at operating temperature, remove air cleaner.
2. Disconnect inlet hose from AB valve and place finger near opening in valve.
3. Run engine at approximately 3000 RPM and quickly release throttle.
2. Suction should be felt at opening. If not, replace AB valve.