nissan Workshop Repair Guides

Nissan and Datsun Workshop Service and Repair Manuals

Spark Plug > < Distributor Advance Unit|Specifications
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Vacuum Spark Delay Valve: Testing and Inspection

1. Remove vacuum delay valve.
2. Blow air from port on distributor side. Air should flow freely.
3. Blow air from opposite port. Resistance should be greater than in step 2.
4. If condition of valve is questionable, dip port in water and blow air from brown face side. Air bubbles should appear.

Spark Plug > < Distributor Advance Unit|Specifications