2012 Polaris Turbo IQ LXT Owners Manual - Page 44

2012 Polaris Turbo IQ LXT Manual

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FEATURES Knock Sensor (Turbo Models) A knock sensor monitors the engine and responds to detonation by automatically reducing the engine timing and adding fuel. This results in decreased engine RPM and performance. Engine performance will be reduced if fuel with a lower octane than 91 is used. See fuel recommendations on page 81. Effect The knock sensor system prevents damage to the engine from detonation while developing the maximum power of the engine safely. If the system senses detonation beyond a preset limit, it retards ignition timing and adds fuel to reduce the detonation and prevent engine damage. When the detonation returns to a permissible level, the system will return spark and fuel to normal, allowing the engine to run at rated power levels. Fail-Safe The knock sensor includes a sensor fail-safe system to prevent the engine from damage if the sensor fails, becomes disconnected or is unable to detect detonation. The rider will experience a loss in power. The sensor must be reconnected or repaired to regain full power. The check engine light will illuminate if the sensor fails or becomes disconnected. 40

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40
FEATURES
Knock Sensor (Turbo Models)
A knock sensor monitors the engine and responds to detonation by auto-
matically reducing the engine timing and adding fuel. This results in
decreased engine RPM and performance.
Engine performance will be reduced if fuel with a lower octane than 91
is used. See fuel recommendations on page 81.
Effect
The knock sensor system prevents damage to the engine from detona-
tion while developing the maximum power of the engine safely. If the
system senses detonation beyond a preset limit, it retards ignition timing
and adds fuel to reduce the detonation and prevent engine damage.
When the detonation returns to a permissible level, the system will
return spark and fuel to normal, allowing the engine to run at rated
power levels.
Fail-Safe
The knock sensor includes a sensor fail-safe system to prevent the
engine from damage if the sensor fails, becomes disconnected or is
unable to detect detonation. The rider will experience a loss in power.
The sensor must be reconnected or repaired to regain full power.
The check engine light will illuminate if the sensor fails or becomes dis-
connected.