A4 Quattro Sedan V6-3.0L (AVK) (2002)
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Replace spark plug.
If the malfunction remains in the same cylinder:
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Replace ignition coil from faulty cylinder with one from another cylinder.
If the malfunction moves with the ignition coil:
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Replace ignition coil.
Test Ground connection
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Disconnect cover -1- on left in engine compartment.
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Unbolt coolant expansion tank (arrow).
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Disconnect electrical wiring to Engine Coolant Level (ECL) warning switch -F66- on bottom of expansion tank.
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Lay coolant expansion tank with connected coolant hoses -1- to -3- aside.
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Disconnect cover -1- on right in engine compartment.
