What does high idle mean on a Duramax Diesel?
What does high idle mean on a Duramax Diesel?
The engine has a cold temperature high idle feature which elevates the engine idle speed from base idle to 1050 to 1100 rpm when outside temperatures are below 0 °C (32 °F), and the engine coolant temperature is below 65 °C (150 °F). This feature enhances heater performance by raising the engine coolant temperature faster.
What causes a Duramax 6.6L diesel to fail?
Overheating problems are most common in warmer climate areas. Combined with hot climate and how much load put on the engine such as when you’re towing heavy things causes higher engine temperatures. The number one reason engine failures happen is because of heat. The fuel system on a Duramax diesel 6.6L operates at very high pressure.
What does fast idle do on a 2020 DMAX?
Fast Idle requires getting into the truck to activate. 2020 dmax manual calls it Fast Idle. If equipped, this system can be used to increase the engine idle speed. . The parking brake is set. .
Where is the ignition switch on a Duramax?
Turning the ignition switch to the LOCK/OFF position. It operates using the cruise control switches, so it should be just a programming change. (like setting an enable ‘bit’?) (the ‘elevated idle’, used to warm the engine and trans, is standard on all 6.6L Dmaxes.) If equipped, this feature is available only with cruise control.
The engine has a cold temperature high idle feature which elevates the engine idle speed from base idle to 1050 to 1100 rpm when outside temperatures are below 0 °C (32 °F), and the engine coolant temperature is below 65 °C (150 °F). This feature enhances heater performance by raising the engine coolant temperature faster.
What should the idle speed be on a diesel truck?
Start the engine. When the procedure is followed the engine idle speed will slowly increased to the calibrated high idle speed. This is 1200 RPM for Light duty, and 1500 RPM for medium duty trucks. The idle speed will return to normal if any of the following conditions occur: There is brake, clutch, or throttle input from the driver.
How does a manual high idle system work?
Manual High Idle System Description The diesel engine has a high idle system to improve the warm-up time of the engine in cold weather conditions. This system allows the engine control module (ECM) to increase the idle speed above the normal calibrated value. The ECM increases the idle speed using the following adjustments:
Fast Idle requires getting into the truck to activate. 2020 dmax manual calls it Fast Idle. If equipped, this system can be used to increase the engine idle speed. . The parking brake is set. .
