Can-Am DS 450 EFI Operator's Manual page 121

ENGINE TURNS OVER BUT FAILS TO START (cont'd)
4. Spark plug/ignition (no spark).
– Check ignition fuse condition.
– Remove spark plugs then reconnect to spark plug caps.
– Check that ignition switch and engine stop switch are at the ON position.
– Start engine with spark plugs grounded to the engine away from spark plug
holes. If no spark appears, replace spark plugs.
– If trouble persists, contact an authorized Can-Am dealer.
5. Engine compression.
– If no pulsating resistance is felt, it suggests a major loss of compression.
– Contact an authorized Can-Am dealer.
ENGINE LACKS ACCELERATION OR POWER
1. Fouled or damaged spark plugs.
– Refer to ENGINE TURNS OVER BUT FAILS TO START.
2. Lack of fuel to engine.
– Refer to ENGINE TURNS OVER BUT FAILS TO START.
3. Engine is overheating (check engine indicator lamp comes ON or flashes).
– Refer to ENGINE OVERHEATS.
4. Air filter/housing clogged or dirty.
– Check air filter and clean if necessary.
– Check liquid/deposits in air filter housing drain tube.
5. Ignition coil disconnected.
– Check ignition coils connection.
ENGINE OVERHEATS
1. Low coolant in cooling system.
– Check engine coolant refer to MAINTENANCE INFORMATION.
– Ensure cooling fan is working properly.
2. Dirty radiator fins.
– Clean radiator fins, Refer to RADIATOR in MAINTENANCE INFORMATION.
3. Cooling fan inoperative.
– Check cooling fan fuse, refer to MAINTENANCE INFORMATION. If fan does
not work and fuse is good, contact an authorized Can-Am dealer.
ENGINE BACKFIRE
1. Faulty spark plugs (carbon accumulation).
– See Refer to ENGINE LACKS ACCELERATION OR POWER.
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TECHNICAL GUIDELINES
119