2008 Dodge Ram 2500 Pickup Owner Manual Diesel - Page 281
2008 Dodge Ram 2500 Pickup Manual
Page 281 highlights
STARTING AND OPERATING 279 NOTE: An optional driver-controlled high idle speed is available on automatic transmission equipped vehicles with speed control. This feature allows the driver to select an elevated idle speed between 1100 and 1500 rpms. Your dealer can enable this feature. The optional driver-controlled high idle speed will help increase cylinder temperatures and provide additional cab heat, however, may still cause the exhaust aftertreatment system to not properly regenerate. Extended periods of idle time should be avoided. NOTE: • If ambient temperatures are low and the coolant temperature is below 200°F (93°C), the engine idle speed will slowly increase to 1000 RPM after 2 minutes of idle, if the following conditions are met: • foot is off brake pedal and throttle pedal • automatic transmission is in Park (P) • vehicle speed is zero • Applying the throttle will cancel fast idle • If the engine is equipped with an exhaust brake, operating the exhaust brake at idle will greatly improve warm up rate and will help keep the engine close to operating temperature during extended idle. 5 CAUTION! Use of aftermarket exhaust brakes is not recommended and could lead to engine damage
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