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Differential Pressure Regulator Fuel Pressure

  1. Connect Pressure Gauge (VW 1318 ) as previously described. See Figure . Close pressure gauge valve. Disconnect differential pressure regulator connector from side of regulator.
  2. Operate fuel pump. Note reading on pressure gauge. Differential pressure should be 4.5-7.3 psi (.3-.5 kg/cm2 ) less than readings noted in the FUEL INJECTION SYSTEM PRESSURE test.
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