1994 Volvo 850
Misfiring at highway driving
speed
Spark plugs fouled.
Drive the vehicle in a lower gear and keep the engine rpm higher for a few miles in order to remove
carbon deposits on the spark plugs. If this procedure in not effective, clean or replace the spark plugs.
Please be aware that faulty plugs can damage the three-way catalytic converter.
Fuel filler flap does not
open
Faulty motor in fuel filler flap-
(sedans):
Open the cover panel on the right tail light unit and pull on the hook. The filler flap can then be opened.
(wagons):
Remove the right floor cover (the center storage compartment must be opened first) and the cover panel
on the right lower tail light. Pull on the hook and the filler flap can then be opened.
pg. 6:18 Service diagnosis (cont.)
Electrically operated sun roof cannot be
closed
No current to sun roof motor
The overload circuit breaker (no. 37 in fuse box) has been activated. Wait approx. 20 seconds for the
circuit breaker to cool down.
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