volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

With Manufacturer's Scan Tool|Page 5434 > < With Manufacturer's Scan Tool|Page 5432
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Fuel Pressure: Testing and Inspection
With Generic Scan Tool

Fuel pressure regulator and residual pressure, checking

Function

The fuel pressure regulator controls the fuel pressure as a function of the Manifold Absolute Pressure (MAP).
The specified value for this test is dependent on the working pressure of the Fuel Pump (FP). This is about 4.0 bar positive pressure

Recommended special tools and equipment

-

V.A.G 1318 Pressure gauge

-

V.A.G 1318/7 Adapter

-

V.A.G 1318/10 Adapter

-

V.A.G 1318/13 Hose adapter

Test requirement

-

Delivery quantity of Fuel Pump (FP) OK, Fuel Pump (FP), checking.  See: Testing and Inspection/With Manufacturer's Scan Tool

Test sequence

WARNING:  Fuel system is under pressure! Before opening system, place rags around the connection point. Then release pressure by carefully
loosening connection.

With Manufacturer's Scan Tool|Page 5434 > < With Manufacturer's Scan Tool|Page 5432