When it comes to Harley Davidson’s, the Engine Idle Temperature Management System (EITMS) is an innovative feature designed to help keep the engine cool during idle or in stop-and-go traffic. While it serves a useful purpose and has found appreciation among many riders, some have encountered issues with the system being overly sensitive or experiencing malfunctions.
We’ve heard reports of EITMS engaging when it’s not necessary, leading to confusion and frustration for riders. Others have found that their system stops working altogether. With these concerns in mind, our goal is to explore common Harley EITMS problems faced by Harley owners and provide insights into possible causes and solutions.
Before getting into details, it’s key to understand the basic concept of EITMS. The system is designed to reduce engine heat by temporarily disabling the rear cylinder while the bike is stationary or moving slowly. In theory, this functionality should offer great benefits for both the engine and rider comfort. However, issues have arisen, prompting us to investigate and provide guidance on addressing these EITMS challenges.
Harley EITMS Overview
We’ve observed that the Harley Engine Idle Temperature Management System (EITMS) is a unique feature designed to help maintain an optimal engine temperature and ensure rider comfort. The system works by temporarily shutting off the fuel injector to the rear cylinder when certain conditions are met, including engine temperature exceeding 284 °F (140 °C), twist grip opening at idle, and vehicle speed below 1 mph (2 km/h) with the engine speed under 1200 rpm.
By turning off the rear cylinder fuel injector, the EITMS essentially transforms the rear cylinder into an “air pump,” circulating air and cooling the engine. This helps to reduce the felt heat on both the rider and the passenger, improving their overall riding experience. Many people have found the system to be effective in managing engine heat. However, some riders have reported issues with EITMS malfunctions and oversensitivity.
We’d like to address some concerns and provide information on proper EITMS usage:
- EITMS can be turned on and off at will, giving riders the ability to control its function as per their needs.
- Applying any throttle input immediately disengages the EITMS, allowing the engine to function normally.
- While the system may sound different when engaged, this is a normal part of its operation and not necessarily indicative of a problem.
- If you experience any issues with EITMS, it is recommended to consult a Harley Davidson technician or call Harley for guidance on resolving the problem.
Understanding the function and benefits of the Harley EITMS is key to fully utilizing its potential for enhancing rider comfort and maintaining optimal engine performance.
Common Harley EITMS Problems
One of the common Harley EITMS problems we’ve noticed is stalling issues. Sometimes, when the system is activated, it might cause the motorcycle to stall unexpectedly, especially during idle or when the throttle is rolled back. This can be both frustrating and potentially dangerous in certain situations.
Although the EITMS is designed to help manage engine temperature, there are instances when it does not seem to function as efficiently as it should. Some riders report that the system activates too quickly, even on cool days, reducing the efficiency of the engine’s cooling process. Consequently, this may lead to increased engine heat and potentially even overheating.
Poor Fuel Economy
We have also encountered cases where the EITMS can negatively affect a motorcycle’s fuel economy. When the system activates and deactivates frequently, it can cause fluctuations in fuel usage, leading to lower overall fuel efficiency. This can be particularly bothersome on longer rides or during extended periods of idling in traffic.
Finally, the EITMS can sometimes lead to decreased performance in certain situations. When the system is activated, it turns off the rear cylinder fuel injector, effectively turning the rear cylinder into an “air pump” to help cool the engine. Although this process can help manage heat, it can also result in power loss and reduced engine performance, especially at specific RPM ranges.
When analyzing issues with the EITMS, we believe it’s important to consider various factors that might contribute to the Harley EITMS problems. In this section, we will discuss three primary causes: Sensor Failures, Software Issues, and Mechanical Problems.
One of the causes of Harley EITMS problems could be sensor failures, impacting the system’s ability to properly monitor and manage the engine temperature. Sensors might degrade or malfunction over time, leading to inaccurate readings and potentially causing the EITMS to not engage or disengage when required. Some potential sensor failures include:
- Temperature sensor malfunctions
- Throttle position sensor issues
Regular maintenance and inspection can help identify and address sensor failures, ensuring that the EITMS functions as intended and our Harley’s engine remains protected.
Software issues can also contribute to Harley EITMS problems. These could range from software bugs to incompatible updates, or even corrupted firmware. When experiencing EITMS-related issues, it’s essential to ensure that the software running on our Harley is up-to-date and free from bugs. Bringing our bike to an authorized Harley dealership for diagnostics and software updates can significantly help in addressing software-related concerns.
Mechanical problems can also play a role in EITMS malfunctions. For instance, if there are issues with the cooling system, the EITMS might not be able to perform optimally. Some mechanical factors to consider include the following:
- Oil system malfunctions
- Reduced circulation in the cooling system
- Improper engine tuning
By thoroughly inspecting and maintaining our motorcycle, we can identify and address any mechanical problems that could affect the EITMS system, ensuring optimal performance and safe operation of our Harley.
When facing Harley EITMS problems, we recommend starting with diagnostic tests. First, ensure the ignition is ON with the bike at idle and not moving, then perform the following steps:
- Push the throttle to roll-off position and hold.
- After approximately 3 seconds, the cruise indicator will flash either red (disabled) or green (enabled).
- Repeat the procedure to change.
If issues persist, consider connecting your bike to diagnostic tools, which can provide additional information on possible faults.
Recalls and Technical Service Bulletins
It’s crucial to stay up-to-date with recalls and Technical Service Bulletins (TSBs) related to the Harley EITMS. These documents provide important information regarding known issues and their solutions. Search for your bike’s make and model on official Harley Davidson websites, or consult your local dealer to check for any relevant recalls or TSBs.
Proper maintenance is essential to keep the EITMS functioning correctly. Here are a few tips to ensure optimal performance:
- Regularly check and replace spark plugs to prevent misfires.
- Inspect and clean the air filter to ensure proper airflow.
- Keep up with scheduled oil changes using the recommended engine oil for your Harley Davidson model.
- Monitor coolant levels and top off as needed, especially for water-cooled engines.
- Check and clean the radiator and cooling fans, as excessive debris may affect their function.
By following these steps, we can keep our Harley EITMS in optimal condition and minimize potential issues.
Solutions and Fixes
When dealing with Harley EITMS problems, there are several solutions and fixes that we can consider. In this section, we will discuss three core areas for addressing EITMS concerns: EITMS Replacement, EITMS Update, and Aftermarket Solutions.
If the EITMS system on your Harley is not functioning as expected or has stopped working altogether, you may need to consider having it replaced. There are situations where the EITMS sensor or other components may be damaged or faulty.
In such cases, we recommend contacting your local Harley-Davidson dealership, which can assess the issue and perform a proper replacement if necessary. Replacing the malfunctioning parts will help bring the EITMS system back to optimal functionality and ensure that your bike remains protected from overheating issues.
Another potential solution for addressing Harley EITMS problems is to check for any software updates that might be available. Harley-Davidson may release updates to improve the performance and functionality of the EITMS system. Staying up to date with these enhancements can help resolve minor issues and ensure that your Harley continues to perform at its best.
To check for updates, reach out to your local Harley Davidson dealership or visit the manufacturer’s website. They can provide guidance on how to install any available updates and offer support for troubleshooting the EITMS system if necessary.
When looking for more control over your Harley’s EITMS system or seeking alternative solutions, aftermarket options may be worth considering. Various providers offer aftermarket cooling solutions that can help support the EITMS system or serve as a stand-alone option for managing engine temperature. These can include oil cooling systems, upgraded radiators, or even enhanced fan kits.
Before opting for any aftermarket solutions, it’s important to do your research and select products from reputable providers. Ensure that the chosen solution is compatible with your specific Harley Davidson model, and consult with a professional installer for optimal results.
Wrapping Up Harley EITMS Problems
Throughout this article, we have explored various aspects of the Harley Engine Idle Temperature Management System (EITMS). As enthusiasts, we understand the importance of maintaining optimal engine temperature, as it plays a critical role in both performance and safety.
We have learned that the EITMS works by turning off the rear cylinder fuel injector when the engine temperature reaches a predetermined point at idle. This causes the rear cylinder to function as an ‘air pump’, assisting in cooling the engine by sucking in air. However, it’s essential to be aware that, like any system, EITMS may encounter malfunctions or issues, potentially impacting performance and rider comfort.
Some potential Harley EITMS problems that may arise include:
- Ineffective activation, possibly resulting from improper throttle handling or electrical issues.
- Unexpected disengagement, which could lead to engine overheating or reduced performance.
- Poor engine performance, which might be attributed to a malfunctioning EITMS.
As riders, it is our responsibility to periodically check our Harley’s EITMS functionality and seek professional assistance if we notice any irregularities. By staying informed and vigilant, we can ensure that our motorcycles continue to provide us with enjoyable and safe riding experiences.