Volkswagen Workshop Service and Repair Manuals > Polo Mk5 > Power unit | 4-cylinder diesel engine (1.6 l engine, common rail) | Fuel supply, gas operation | Repair instructions if tank has been filled with incorrect fuel | Step 1 (Engine was started with incorrect fuel)

Step 1 (Engine was started with incorrect fuel)

–	Empty fuel tank as far as possible via fuel filler neck using fuel extractor -VAS 5190- → Chapter.

–	Remove bench seat → General body repairs, interior; Rep. gr.72.

–	Remove cover from fuel delivery unit.

Note

Press in securing ring to release fuel line.

WARNING

Bear in mind that the fuel pump can be activated due to opening of a door with the battery connected. Fuel can escape if the system has been opened.

–	Pull fuel return line (blue line or blue marking) -2- off fuel delivery unit.

–	Connect pressure gauge pipe -VAS 6551/5-2- to the fuel return line -1-.

–	Put open end of line -VAS 6551/5-2- into a suitable container.

–	Connect vehicle diagnosis tester and then carry out guided function „Fuel pump activation“.

Note

The fuel pump is now activated.

–	Repeat procedure, if necessary, until fuel tank is completely empty.

–	Remove fuel delivery unit → Chapter.

–	Check fuel tank for metal particles.

–	Drain fuel pump reservoir of fuel delivery unit.

–	Carry out a visual inspection for heavy soiling and metal particles in fuel pump reservoir and on preliminary filter.

Metal particles found?

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