Variable Induction Control Valve: Testing and Inspection

Bypass Valve Testing

CAUTION: Do not adjust the bypass valve full-close screw. It was preset at the factory.

1. Check the bypass valve shaft for binding or sticking.
2. Check the bypass valve for smooth movement.





3. With the engine at idle, check that (A) of the bypass valve is in close contact with the stopper when vacuum hose is disconnected.





4. With the engine off, check that (B) of the bypass valve is in close contact with the full-close screw.
- If any fault is found, clean the linkage and shafts with carburetor cleaner.
- If the problem still exists after cleaning, disassemble the intake manifold and check the bypass valve.