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Home >> Audi >> 1983 >> 5000 Base >> Repair and Diagnosis >> Engine Performance >> System >> Fuel Injection System - BOSCH Cis >> Removal & Installation >> Frequency Valve
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Frequency Valve

  1. Disconnect electrical connector. Hold small nut at hose and loosen larger valve nut. DO NOT  spill gasoline on rubber mounting insulator as it will cause the rubber to swell.
  2. Remove return lines at fuel distributor and/or control pressure regulator. To install, reverse removal procedure, using new gaskets. Check for leaks after installation.
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