volkswagen Workshop Repair Guides

Volkswagen Workshop Manuals

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Inspect ECM ground (GND) connection for corrosion, poor or no connection.

2.

Injection pump timing, checking

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Check start of injection pump timing (see Repair Group: Diesel direct injection system, servicing)

Tip:

An adjustment to the upper range is advised.

3.

Snow screen (if applicable) at intake air duct, checking

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Check snow screen, located below left front fender in air duct -3-, and clean as necessary.

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Inspect air cleaner element -1- for proper installation.

If air cleaner element is deformed due to improper installation, this may
cause the MAF sensor to fail.

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Replace air cleaner element as necessary.

4.

Vacuum hoses

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Check integrity of all vacuum hoses and connections, and repair as needed.

5.

EGR valve and intake manifold air flap (integrated in EGR valve), checking

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Remove intake hose -1- at EGR valve.

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Remove vacuum hose from EGR valve -2-.

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Connect hand vacuum pump to EGR valve -2-. See --> Required

Parts and Tools.

Powertrain Management > Relays and Modules - Powertrain Management > Relays and Modules - Computers and Control Systems > Engine Control Module > Component Information > Technical Service Bulletins > All Technical Service Bulletins for Engine Control Module: > 2307-02 > Aug > 07 > Diesel Engine - Poor Throttle Response > Page 2699

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