Passat L4-1984cc 2.0L DOHC (1991)
e. Fouled plug (may be caused by):
Rich fuel mixture
Retarded ignition timing
Oil in combustion chamber
Incorrect spark plug gap
Plug heat range too low
Excessive idling/low speed running
Clogged air cleaner element
Deteriorated ignition coil, coil wire or ignition wires
3.
Replace the plug if the center electrode is rounded (except some platinum type plugs which have a very small diameter center electrode with an
insulator that covers the electrode to the tip and may be rounded), this indicates high milage.
4.
Adjust the gap with a suitable gapping tool to the following specification:
0.027 - 0.035 in. (0.7 - 0.9 mm)
5.
Reinstall spark plug. Use some anti-seize compound on the threads and torque to:
15 ft.lbs (20 Nm)
6.
Reconnect spark plug wire.
