Step 4: No Shavings In The Fuel Delivery Unit And Reservoir

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-- Fill the fuel tank with 5 liters of diesel fuel.

-- Drain the fuel tank completely once more as described above. Refer to STEP 1: ENGINE WAS STARTED WITH INCORRECT FUEL .

CAUTION:

Removing the Fuel Metering Valve -N290- increases the risk that the high pressure pump will be damaged from the outside by debris. For this reason, always make sure that it is clean.

-- Carefully clean the high pressure pump near the Fuel Metering Valve -N290-.

-- Remove the connector from the valve.

-- Remove the bolts -arrows- and carefully remove the Fuel Metering Valve -N290-.

Fig 1: Identifying Bolts

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Inspect the Fuel Metering Valve -N290- and the high pressure pump for metal shavings.

Are there any shavings?

Yes. Refer to STEP 5: SHAVINGS IN THE HIGH PRESSURE PUMP .

No. Refer to STEP 6: NO SHAVINGS IN THE HIGH PRESSURE PUMP .