Aux Air Regulator, Checking

Auxiliary air regulator, checking





Note: When engine is cold, regulator is open fully, allowing additional air to engine.

- Engine cold
- Run engine at idle speed
- Pinch hose (arrow)
RPM must drop
- Run engine at idle speed for about 5 minutes more
- Repeat above test
RPM must not change

If RPM drops:
- Disconnect electrical plug from auxiliary air regulator
- Check voltage supply with engine running

If voltage is OK:
- Replace auxiliary air regulator