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Home >> Land Rover >> 1990 >> Range Rover Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System & Component Testing >> Ignition Systems >> Vacuum Delay Valve >> External Leakage Check
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External Leakage Check

  1. Seal colored side of valve and attach a short flexible pipe to other end.
  2. Submerge valve in water and orally blow through valve.
  3. If any external leakage is noticeable, fit a new valve. If delay valve does not comply with any of test results, replace unit.
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