TT Coupe L4-1.8L Turbo (AWP) (2005)
If misfiring is detected:
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Continue test on cylinder indicated => "When the defective cylinder has been identified:".
If no misfiring is detected:
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Unplug the connectors from the injectors in turn with the engine running, and observe how the engine runs,
or
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Compare the spark plugs of all cylinders with each other and check for soot on the electrodes.
When the defective cylinder has been identified:
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Swap spark plug of defective cylinder with one from another cylinder.
If the fault moves with the spark plug:
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Replace spark plug.
If the fault remains in the same cylinder:
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Swap ignition coil of defective cylinder with one from another cylinder.
If the fault moves with the ignition coil:
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Replace ignition coil.
Testing Ground connections
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Unplug 4-pin connector -1- from ignition coil -2-.
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Connect VAG 1527 B voltage tester as follows:
Connector Contact
Measure against
2
Battery positive
4
Battery positive
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The LED should light up.
If the LED does not light up:
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Check the wiring.
If the LED lights up:
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Check voltage supply.
Checking voltage supply