The Engine Idle Temperature Management System (EITMS) on Harley-Davidson motorcycles is designed to enhance engine cooling during prolonged idle conditions. This feature turns off the rear cylinder when the engine reaches a certain temperature, allowing it to cool down while maintaining idle speed.
While many riders appreciate its functionality, others may prefer to disable it for a smoother riding experience. This article will guide you How to Disable EITMS on Harley, providing detailed instructions based on user experiences and technical insights.
By the end of this guide, you will have a clear understanding of how to manage this feature effectively and enhance your riding comfort.
Understanding EITMS
The Engine Idle Temperature Management System (EITMS) is a sophisticated feature found in many Harley-Davidson motorcycles. Its primary function is to enhance engine cooling during prolonged idle conditions, a scenario common in heavy traffic or stop-and-go riding.
As the engine temperature rises, EITMS automatically activates, turning off the rear cylinder’s fuel injector. This allows the cylinder to function as an air pump, helping to cool the engine while maintaining idle speed.
Functionality of EITMS
When the engine temperature exceeds 287°F (165°C), the EITMS kicks in under specific conditions: the twist grip is at idle, the vehicle speed is under 1 mph (2 km/h), and the engine speed is below 1200 RPM. Once activated, the rear cylinder stops firing, allowing it to cool.
The feature is designed to help prevent overheating, which could result in engine damage.
When EITMS Activates
EITMS activates when the engine temperature is greater than 287°F (165°C), and the motorcycle is stationary. If the temperature drops below 275°F (135°C), the system will deactivate, allowing the rear cylinder to fire again.
This dynamic operation is crucial for maintaining engine health, particularly in hot weather or during lengthy stops.
Benefits of EITMS
The implementation of EITMS provides several benefits, including:
- Improved engine cooling during idle conditions.
- Reduced risk of overheating in heavy traffic or prolonged idle scenarios.
- Maintained idle speed, ensuring smoother operation.
Understanding how EITMS functions can help riders appreciate its importance, but it also prepares them for situations where disabling it may enhance the riding experience.
Models Equipped with EITMS
Harley-Davidson has integrated the EITMS into various motorcycle models over the years. Below is a list of models that come equipped with EITMS as a standard feature, along with their production years:
| Model | Years Equipped with EITMS |
|---|---|
| Touring Models | 2008 – Present |
| Dyna Models | 2013 – 2017 |
| Softail Models | 2018 – Present |
| Sportster Models | 2016 – Present |
This table highlights the range of Harley models that feature EITMS, helping riders identify if their motorcycle is affected by this system. Touring models consistently include this technology due to their frequent use in varying riding conditions.
Steps to Disable EITMS
Disabling EITMS can be a straightforward process if the proper steps are followed. This section provides a detailed, step-by-step guide to help riders disable EITMS on their Harley motorcycles.
Preparing to Disable EITMS
Before you begin, ensure the motorcycle is on a stable surface and the ignition is off. Gather any tools you may need and familiarize yourself with the motorcycle’s controls, particularly the throttle and ignition switch.
Executing the Disable Procedure
Follow these steps to disable EITMS:
- Turn the ignition switch to the ON position.
- Push the engine OFF/RUN switch on the right handlebar to the RUN position (do not start the motorcycle).
- Roll the throttle to the roll-off position and hold it.
- Observe the cruise control indicator lamp. After approximately 3 seconds, it will flash indicating the EITMS status. A flashing green light means EITMS is enabled, while a flashing amber light indicates it is disabled.
- Repeat the process as necessary to toggle the EITMS setting.
Confirming the Status of EITMS
After executing the procedure, check the indicator lamp to confirm that EITMS has been successfully disabled. If the lamp flashes amber, the system is off.
This setting will remain until it is changed again by the rider or dealer, meaning there is no need to reconfigure EITMS at each startup.
Troubleshooting Common Issues
While disabling EITMS is typically a straightforward process, riders may encounter some common issues. This section addresses those problems and how to resolve them effectively.
Indicator Light Not Changing
If the indicator light does not change as expected, ensure that the throttle is held in the roll-off position for a full 3 seconds. If the issue persists, it may be necessary to repeat the process several times, as some riders have reported needing to do this to achieve the desired outcome.
EITMS Not Disabling After Procedure
In some cases, EITMS may not disable even after following the steps correctly. This issue can be due to a software glitch or a need for a dealer update.
If the system does not respond, consider visiting a Harley-Davidson dealer for assistance. They can perform an Electronic Control Module (ECM) update that may resolve underlying issues.
Dealer Assistance Options
For persistent problems, reaching out to a certified Harley-Davidson dealer is recommended. They can provide professional assistance and may have access to updates or diagnostic tools that can address EITMS issues effectively.
This option ensures that your motorcycle functions optimally.
User Experiences and Insights
Real-world experiences shared by Harley riders regarding EITMS can provide valuable insights. This section summarizes user feedback and preferences regarding the feature.
Positive Experiences with EITMS
Many riders appreciate the EITMS for its ability to maintain engine temperature in stop-and-go traffic. Users report that the system effectively prevents overheating, especially in hot weather conditions, leading to a more comfortable riding experience.
Reasons for Disabling EITMS
Conversely, some riders choose to disable EITMS due to the changes in engine sound and performance. The transition to running on one cylinder can create a unique, sometimes undesirable sound that some riders find unsettling.
Additionally, the perceived roughness in idle can detract from the overall riding experience.
Performance Changes After Disabling
After disabling EITMS, riders often notice a smoother idle and a more consistent engine sound. Many report improved responsiveness and a preference for the bike’s overall performance without the system interfering.
This feedback is essential for those considering whether to enable or disable EITMS based on their riding style.
When to Consider Re-enabling EITMS
For those who have disabled EITMS, there may be situations where re-enabling the system is beneficial. This section discusses those scenarios.
Riding in Traffic
In heavy traffic, EITMS can be a valuable asset, helping to cool the engine during prolonged stops. If you frequently find yourself in congested areas, consider re-enabling EITMS to take advantage of its cooling benefits.
Hot Weather Conditions
During extreme heat, the risk of engine overheating increases. In such conditions, it may be wise to enable EITMS to ensure that the engine remains within safe operating temperatures, preventing potential damage.
Engine Performance Considerations
For riders focused on long-distance touring or those who frequently ride in warm climates, keeping EITMS enabled may enhance engine longevity and performance. This proactive approach can help avoid overheating and ensure a smoother ride overall.
Alternatives to EITMS
This section explores tuning options and aftermarket solutions for those looking for alternatives to EITMS while maintaining engine performance and cooling.
Aftermarket Tuners
Many riders opt for aftermarket tuners that allow for custom adjustments to engine performance. These devices can help optimize fuel management, cooling, and overall engine efficiency, potentially providing a solution for those looking to disable EITMS without sacrificing performance.
Engine Cooling Solutions
Installing additional cooling devices, such as oil coolers or fans, can mitigate overheating issues without relying on EITMS. Many riders find that enhancing cooling systems provides the necessary support for high-performance applications.
Performance Enhancements
For those looking to enhance their motorcycle’s overall performance, consider upgrading components such as exhaust systems or air intakes. These improvements can lead to better engine cooling and efficiency, offering a viable alternative to EITMS.
FAQs on How to Disable EITMS on Harley
What is EITMS?
EITMS stands for Engine Idle Temperature Management System. It is a feature in many Harley-Davidson motorcycles that helps manage engine temperature by disabling the rear cylinder during prolonged idle conditions.
This prevents overheating and ensures smoother operation.
How do I know if my Harley has EITMS?
You can determine if your Harley has EITMS by checking the owner’s manual or consulting with a Harley-Davidson dealer. Generally, models from 2008 to the present, particularly those with the Milwaukee-Eight engine, are equipped with EITMS.
Can I disable EITMS while riding?
It is not advisable to disable EITMS while riding. The procedure is designed to be performed when the motorcycle is stationary.
Disabling it while in motion could potentially lead to unsafe riding conditions or engine performance issues.
What should I do if the EITMS doesn’t disable?
If EITMS does not disable after following the procedure, consider visiting a Harley-Davidson dealer for assistance. There may be a need for a software update or other diagnostics to resolve the issue.
Will disabling EITMS affect my bike’s performance?
Disabling EITMS can lead to a smoother idle and performance for some riders, as the bike will run on both cylinders at all times. However, it may also increase the risk of overheating in traffic or hot weather conditions, potentially affecting long-term engine health.
Conclusion
In conclusion, disabling the EITMS on your Harley-Davidson motorcycle can significantly alter your riding experience, especially in terms of engine performance and comfort. By following the steps outlined in this guide, riders will be able to manage this feature effectively.
Whether you choose to keep EITMS enabled or disabled, understanding its function and operation will enhance your overall riding experience. Always consult your owner’s manual for specific details and consider reaching out to a dealer for assistance if needed.