Vacuum Check Valve: Testing and Inspection

Inspection

- Check that air flows from the orange port to the black port.
- Check that air does not flow from the black port to the orange port.
- If operation is not as described, replace the check valve.


*** UPDATED BY TSB #EG94001 DATED MAY 20, 1994 ***


Discontinued Mid 1994 production year. Models with production vin JT8UF11E4R0196973 or later, or have a production date later than 01/94 have no secondary air injection system. Always consult the ECS label to verify equipment required on the vehicle.