Check Valve

1. Remove check valve from system.
2. Blow through valve in direction of air pump air flow. It should flow freely.
3. Turn valve around and blow through opposite side. No air should go through.
4. If valve acts in any other way, replace it.

Fig 1: Le Car Air Shut-Off Valve

Courtesy of AMERICAN MOTORS/RENAULT CORP.

Choke controlled air shut-off valve prevents air from being injected into the exhaust manifold during cold starts.