Differential Pressure Regulator Fuel Pressure
- Connect Pressure Gauge (VW 1318 ) as previously described. See Figure . Close pressure gauge valve. Disconnect differential pressure regulator connector from side of regulator.
- 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.