6.7 Cummins High Idle in Park

The 6.7 Cummins high idle in park is a feature that allows the engine to automatically increase its idle speed when placed in Park, allowing for faster warm-up and quicker response times. This feature can be activated or deactivated using either an on/off switch located on the dash, or through special tuning software from aftermarket sources such as Bully Dog or H&S Performance. When active, you should notice your truck’s RPMs jump up slightly when shifted into Park; this is normal behavior and indicates that the high idle feature is working properly.

The increased rpm also helps reduce stress on other components while idling and aids in keeping temperatures down during hot weather conditions.

The 6.7 Cummins engine is a popular choice for those who need to tow heavy loads, but it has its own unique feature that can be both helpful and annoying at the same time – High Idle in Park. Once you put your truck into park, the engine will automatically idle up to 1,000 RPMs which can be incredibly helpful if you’re going to be stopped with the AC running or are working on something under the hood. This high idle can also be very annoying when you just want to enjoy some peace and quiet, so thankfully there’s an easy way of disabling it with a few simple steps!

HIGH IDLE!! How to put your 6.7L Cummins in High Idle.

What Causes a Diesel to Idle High?

A diesel engine idling high is a common issue that can be caused by several different factors. Most commonly, the idle speed of an engine is controlled by the computer in your vehicle and it may adjust the idle speed if it detects any changes in temperature or other environmental conditions. A malfunctioning throttle position sensor (TPS), vacuum leaks, air intake system problems, or an incorrect fuel pressure regulator setting can all cause a diesel engine to run at higher RPMs than normal when idling.

Additionally, clogged fuel filters and faulty injectors can also play a role in causing high idle speeds on diesels. Finally, worn out spark plugs or incorrect timing settings could lead to higher-than-normal engine speeds as well. If you suspect that your diesel is running too fast at idle, take it into your local mechanic for diagnosis and repair as soon as possible so they can identify and fix the underlying problem quickly before further damage occurs.

Is High Idle Bad for Diesels?

High idle affects diesel engines differently than it does gasoline-powered engines. While a high idle can cause excessive fuel consumption and wear on the engine in both types of vehicles, diesels are more vulnerable to damage from excessively high idling. When a diesel engine is left running at an abnormally high RPM for too long, it can cause accelerated wear on several components including the turbocharger, glow plugs, piston rings and valves.

This kind of damage will decrease the performance and lifespan of the vehicle significantly. A higher idle also causes greater heat buildup inside the motor which affects oil quality resulting in decreased lubrication that leads to increased friction between parts leading to further deterioration. As such, it’s important to keep your car’s idle speed within optimal levels whenever possible as this will help ensure that you get maximum efficiency out of your vehicle while minimizing any long term damage caused by high idling speeds.

How Do You Turn on High Idle on a 6.7 Cummins?

To turn on high idle on a 6.7 Cummins, you will first need to locate the ignition switch and then press it for about three seconds. This will activate the high idle mode and your engine should increase its revolutions per minute (RPM). After that, locate the throttle body in order to adjust the RPM level of your engine.

To do this, you’ll want to twist or pull up on a small lever near the base of the throttle body. You’ll feel resistance as you move it further away from its neutral position; make sure not to go too far so that you don’t damage anything! Once you’ve adjusted your desired RPM levels, release the lever and allow your 6.7 Cummins engine to remain at higher speed until shutdown or until manually changed back down again by repeating these steps in reverse order.

How Do You Set High Idle on a 2017 Cummins?

Setting a high idle on a 2017 Cummins engine is an important part of maintenance and ensuring your vehicle runs properly. To do this, you will need to access the ECU (Engine Control Unit) through the diagnostic port located underneath the hood. Once connected, you can use software such as Cummins INSITE or other compatible programs to adjust engine settings like RPMs.

Depending on which model of Cummins you have, there may be several different ways to set up a higher idle speed. If yours has an adjustable throttle arm, it can be adjusted manually while monitoring with a tachometer; otherwise spring tensioners must be used in conjunction with controlling parameters from within the ECU instead. In addition to increasing your idle speed, setting up proper exhaust back pressure for turbocharged engines is also necessary for smooth operation and increased performance at higher RPMs.

Doing so requires additional tools such as an EGT gauge and intake air temperature sensor that should be calibrated by authorized personnel according to manufacturer’s specifications before attempting any adjustments yourself..

6.7 Cummins High Idle in Park

Credit: www.standardbrand.com

6.7 Cummins High Idle With Exhaust Brake

The 6.7 Cummins High Idle with Exhaust Brake is a great choice for those who need to tow heavy loads, as it provides the power and torque necessary for driving up steep gradients without having to downshift. This feature also increases fuel economy by reducing engine load while idling, allowing you to maintain consistent speed on long downhill stretches. Additionally, the exhaust brake helps reduce wear on your brakes and lowers the temperature of your vehicle’s braking system so that it lasts longer.

6.7 Cummins High Idle Not Working

If your 6.7 Cummins is not idling at its normal RPM, you may need to troubleshoot the engine components or adjust the idle speed setting. It could be an issue with the fuel system, a faulty throttle position sensor, or dirty air filter – all of which would affect your engine’s ability to idle normally. Additionally, if your high idle setting has been adjusted too low it can cause problems with starting and running.

If you are having trouble with your 6.7 Cummins high idle not working properly, it’s important to thoroughly diagnose and repair any underlying issues before attempting to modify the settings again.

Cummins High Idle on Its Own

Cummins high idle is a feature of Cummins diesel engines found in many heavy-duty trucks, buses and motor homes. When enabled, the engine will automatically increase its RPMs when idling for extended periods of time. This helps to keep temperatures consistent and reduce wear on the engine by providing additional lubrication.

The Cummins high idle also provides power for accessories such as air conditioning or heaters while stationary.


This blog post has provided a comprehensive look at the 6.7 Cummins High Idle in Park and how to adjust it. Although, it is important to always follow safety precautions when adjusting high idle settings and consult your vehicle’s manual for specific instructions, this article has given you an overview of the process and what to expect. With the right knowledge, adjusting your 6.7 Cummins High Idle in Park should be easier than ever before!


  • Zayn

    John Zayn Smith is a renowned truck enthusiast, automotive industry expert, and author. Beginning his career as a mechanic, Zayn's curiosity led him to explore all facets of the trucking world, sharing his insights through in-depth articles on TruckGuider.com. His knowledge spans truck mechanics, trends, and aftermarket modifications, making him a trusted resource for both professionals and hobbyists. Outside writing and mechanics, Zayn enjoys off-roading, truck shows, and family time. Follow his work for the latest in truck-related news and tips.

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