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.
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.
What’s the difference between high idle and fast idle?
Sometimes called High idle. Sometimes called Fast Idle. Primary use if to keep accessories (and PTO is equipped) drive running faster. Its’not intended create heat the way the elevated idle does. Fast Idle requires getting into the truck to activate. 2020 dmax manual calls it Fast Idle.
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. .
What does elevated idle mean on a Duramax Diesel?
The fuel injection quantity is changed. The turbocharger vane position is commanded closed. the vane position will be farther closed than any other normal operating condition. The instrument panel will indicate the high idle system is active one of two ways:
Is there a 6.6 Duramax that wont start?
Chevrolet: 6.6 duramax wont start all of a sudden . Turns… I have a 2009 chevy 2500HD with the 6.6 Duramax. I started I have a 2009 chevy 2500HD with the 6.6 Duramax. I started the truck with my remote while I was opening my shed it ran for a couple of seconds … read more
Are there any problems with the Duramax engine?
The failure is most common in higher horsepower engines, but can still occur in moderately modified and even stock power plants. Not specific to one version of Duramax in particular (ex: LB7, LLY, LBZ, LMM or LML), the problem exists across all generations.
How to enable or disable high idle system?
To enable or disable the high idle system perform the following procedure: Turn the ignition ON with the engine OFF. Depress the accelerator pedal to the floor and hold down. While the accelerator pedal is depressed, depress the brake pedal 3 times in less than 8 seconds.
When does the idle speed go back to normal?
When the engine is started, it will slowly ramp up to the high idle speed after a delay of a few seconds up to approximately two minutes. For this method to work properly there must be no throttle or brake pedal faults. The engine idle speed will return to normal once the following conditions are met:
Which is higher high idle or HIGH idle?
The vehicle speed is not 0 km/h (0 mph). Fast/High idle is slightly higher rpm than Elevated idle. I’ve alway assumed it was to aid in identifying why the truck was not at ‘normal’ idle. When the truck is in regen, it will idle at higher rpm than normal – but not as high as these two functions.
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.
When the engine is started, it will slowly ramp up to the high idle speed after a delay of a few seconds up to approximately two minutes. For this method to work properly there must be no throttle or brake pedal faults. The engine idle speed will return to normal once the following conditions are met:
The vehicle speed is not 0 km/h (0 mph). Fast/High idle is slightly higher rpm than Elevated idle. I’ve alway assumed it was to aid in identifying why the truck was not at ‘normal’ idle. When the truck is in regen, it will idle at higher rpm than normal – but not as high as these two functions.
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. .