Volvo 780 Owner's Manual page 58

1989 Volvo 780
Catalytic Converter Cautions
Keep your engine properly tuned. Certain engine malfunctions, particularly involving the electrical,
fuel or ignition systems, may cause unusually-high converter temperatures. Do not continue to operate
your vehicle if you detect engine misfire, noticeable loss of power or other unusual operating conditions,
such as engine overheating. or backfires. A properly tuned engine will help avoid malfunctions that
could damage the Catalytic Converter.
Remember that tampering or unauthorized modifications to the engine or the vehicle may be illegal
and can cause catalyst or exhaust system overheating. This includes: Altering fuel injection settings or
components. Adjusting ignition timing beyond specified limits. Altering emission system components or
location or removing components. Repeated use of leaded fuel.
WARNING!
Do not park your car over combustible materials, such as grass or leaves, which can come into
contact with the hot exhaust system and cause such materials to ignite under certain wind and weather
conditions.
Excessive starter cranking, in excess of one minute, with an intermittently-firing or flooded engine,
can cause catalyst or exhaust system overheating. This also applies to lengthy pushing or towing of
vehicle to start (manual transmission only).
CAUTION:
Unleaded fuel is required for cars with catalytic converter. A label is located on the instrument panel and
inside the fuel tank filler lid to remind owners and filling station attendants of this requirement.
Important! It is unlawful to dispense leaded fuel into any vehicle labeled "unleaded gasoline only".
pg. 55 Brake system
If one of the brake circuits should malfunction, the red warning light will come on
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