Phoenix L4-151 2.5L VIN 5 2-bbl (1982)
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Air Injection Check Valve: Service and Repair
1. Remove check valve(s) from vehicle.
2. Blow through check valve in direction of AIR manifold or cylinder head, then attempt to suck back in reverse direction.
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Air should only flow towards air manifold or cylinder head. If this is not the case, replace check valve.