When dealing with low power issues in medium duty vehicles, the code DT466 may be the culprit. However, there are various other codes, such as Dt3608.35.93453044-536v53Turoflow, that could indicate the same issue. Make sure to thoroughly check the basics like air and fuel filters to rule out any simple causes before diving deeper into diagnostics. It's possible that by the time I finish listing all the potential codes, I may run out of space on this page.
According to wlhequipment, the "A" in the code means active, while the "P" signifies previous. The code 613 specifically pertains to environmental controls and does not relate to the engine. Thank you for sharing this valuable insight. Obtaining a comprehensive list of codes can be a challenging task.
- 05-09-2024
- Slingshot ammo
According to wlhequipment, the "A" denotes active and the "P" indicates previous in relation to the 613 code, which pertains to environmental controls rather than the engine.
- 06-09-2024
- Slingshot ammo
According to user Tyler_d4c, the codes Dt3608.35.93453044-536v53 Turoflow are commonly found in medium duty vehicles with low power output. With so many codes to list, it's possible to run out of room on the page. Before diving deeper into the diagnostics, have you looked into basic maintenance tasks like checking the air and fuel filters? Yes, I have already replaced the filter and cleaned the screen. The fuel supply pressure is currently at 55.
- 06-09-2024
- Slingshot ammo
When discussing the 55 psi delivery pressure, are you referring to the lift pressure? The lift pump, located at the end of the HPOP, plays a crucial role in the engine's performance. It's important to address any leaks in the HPOP system, as even small seeps from the manifold can lead to poor engine performance. The steel gasket in the manifold is prone to leaking and should be closely monitored. Additionally, be sure to check for diesel leaks, as fuel leakage can result in air entering the system. Keep an eye on fluid levels for any unusual changes, especially coolant levels in a cool engine. It's normal for engines to burn a little oil, but be cautious if the oil level is increasing or remaining constant. Pay attention to the engine's blowby and boost levels. If everything appears to be in order, it may be time to utilize servicemax for further diagnostic tests on the engine.
If you are checking the pressure at the quick coupler on the fuel filter cap, it is important to note that 55 PSI is lower than the recommended range of 65-75 PSI in the manual. The presence of a stainless steel restricter/orifice at the bottom of the fuel filter housing can lead to low fuel pressure due to debris accumulation on the seat. To address this issue, consider removing the restricter/orifice and cleaning it with compressed air. It is possible to clean the restricter/orifice, but if replacement is necessary, it can cost around $107. Use a 7mm allen socket to remove it.
Inspect the bottom of the filter cavity for dirt and rust buildup. Cleaning may be required, although it can be challenging to remove the housing due to the surrounding obstruction. Special attention should be paid to the O-ring where the housing attaches to the intake, and ensure you have four olives for the steel lines.
In the case of the 04 to 07 DT466 models, there is no fuel return line. Instead, fuel returns through the restrictor/orifice to the fuel inlet. This means any dirt and rust present will continue circulating through the system until the restrictor/orifice develops a buildup on the seat again. Regular maintenance is recommended to prevent this issue.
In response to mekanik's comment, it is important to note that checking the fuel pressure at the quick coupler on the fuel filter cap is crucial. The ideal pressure range should be between 65-75 PSI, so 55 PSI may be on the lower side. A stainless steel restrictor/orifice located at the bottom of the fuel filter housing can often get clogged with debris, leading to low fuel pressure. Removing and cleaning this restrictor/orifice with compressed air can help improve fuel flow. In some cases, it may need replacement, which typically costs around $107. Ensure to thoroughly inspect the bottom of the filter cavity for dirt and rust accumulation, as this can affect the fuel system's performance. It is recommended to use a 7mm allen socket to remove the housing for cleaning or maintenance.
Moreover, WLH Equipment's advice regarding the HPOP system is valuable. Any leaks in the HPOP system, including the steel gasket prone to leaking, can result in engine performance issues. Checking for fuel leaks, fluctuations in fluid levels, and unusual changes in coolant or oil levels is essential. Monitoring blowby and boost levels can also provide valuable insights into the engine's condition. If everything seems to be in order, consider using a servicemax tool for further diagnostic checks.
Lastly, the screen mentioned by mekanik refers to the small strainer basket housed at the bottom of the fuel filter housing. If checking the fuel lift pressure at the quick coupler is not feasible, try accessing the shrader valve on the fuel manifold at the front of the engine for pressure readings. Be proactive in checking and maintaining the fuel system components to ensure optimal engine performance. Thank you for the informative response!
- 06-09-2024
- Slingshot ammo
In a recent exchange, wlhequipment inquired about the pressure screen and clarified the 55 psi delivery pressure. It was later determined that the lift pressure was of concern, particularly with the lift pump located on the end of the HPOP. The engine is highly sensitive to leaks within the HPOP system, with even minor seeps from the manifold on the head causing performance issues. The steel gasket in this area is known to be prone to leakage. It is essential to also check for diesel leaks, as fuel leaks can result in air entering the system. Monitoring fluid levels is crucial, particularly with coolant levels remaining constant on a cool engine. Additionally, keeping an eye on oil levels is important as some oil consumption is normal. It is essential to ensure that the engine is not burning oil at the same rate that fuel is being added. Regularly checking blowby and boost levels is recommended. If everything appears to be in order, it may be time to utilize servicemax for further engine diagnostics. It is worth noting that no fuel leaks have been detected at this time.
- 06-09-2024
- Slingshot ammo