Vanagon Syncro AWD L4-2109cc 2.1L (1987)
Fuel Pressure: Testing and Inspection
Checking Operating Pressures
Checking Pressure Regulator
The pressure regulator regulates the fuel pressure in relation to the intake manifold pressure.
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Connect pressure gauge VAG 1318 or equivalent with adaptor to T-piece 1 of fuel line
CAUTION: Pressure gauge lever must be in closed position during measurement procedure
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Run engine at idle speed and check pressure
Approx. 2.0 bar (29 psi) w/ vacuum hose connected
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Disconnect vacuum hose (2 in illustration) to pressure regulator
Approx. 2.5 bar (36 psi) w/ vacuum hose disconnected