Eurovan V6-2800cc 2.8L (AES) (2000)
Fuel Pressure: Testing and Inspection
The Fuel Pressure Regulator Controls Fuel Pressure Relative To Manifold Absolute Pressure.
Special tools, testers and auxiliary items
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VAG 1318 Pressure tester
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1318/10 Adaptor
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VAG 1318/1 Hose
Requirement:
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Fuel pump delivery rate OK
Test sequence:
CAUTION:
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Fuel system is pressurized! Wrap a cloth around the connection before loosening hose connections or opening a test connection. Carefully release
pressure by pulling off the hose or by removing the plug.
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Remove plug -1-on fuel pressure regulator bracket.
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Connect VAG 1318 pressure gauge to measuring connection using VAG 1318/10 adaptor with VAG 1318/1 hose.
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Close pressure gauge shut-off,
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lever must be perpendicular to flow -arrow->.
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Start engine and let idle:
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Measure fuel pressure.
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Specification: approx. 2.5 bar.
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Pull vacuum hose off fuel pressure regulator -arrow->.
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fuel pressure must increase to approx. 3.0 bar.
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Switch OFF ignition.
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Check for leaks and at same time measure residual pressure by watching pressure drop on gauge.
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After 10 minutes residual pressure must be 2 bar minimum.
If pressure drops below 2 bar:
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Start engine and let idle.
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After pressure has built-up, switch OFF ignition.
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Immediately thereafter, clamp fuel return line (blue markings) positioned on fuel pressure regulator bracket.