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By Prepper
I have been doing a little research on which engine oil is best for UTV engines. There seems to be some disagreement over using a good quality regular engine oil, and the necessity of using "M2" (or wet clutch suitable) oil. My understanding is the "wet clutch" suitable oil has less friction reduction properties (hence a more responsive clutch with less slippage). While less friction reduction properties would seem to be better for the wet clutch... it would not be best for the internal engine parts like camshaft bearings and other moving parts where friction is detrimental and would lead to premature failure. Some folks swear you need M2 oil, while others say they have been using regular motor oil for years and their clutch is just fine. Could they both be right ???
Any thoughts ?
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By aefron88
This post will explain how to hook up your PC to the ECU of a Hisun/Coleman/Etc UTV to be able to read error codes & engine parameters for troubleshooting purposes.
This is applicable to all small engines using the Delphi MT-05 ECU. This should cover all fuel injected Hisun models, as well as various other Chinese FI engines, as the Delphi MT-05 ECU seems to be the favored ECU solution.
Even though we get actual engine error codes to display on the dash, sometimes we have “pending codes” (not yet confirmed by the ECU) or other intermittent issues that are hard to diagnose, for example a poorly connected sensor that may give intermittent false readings, or a sensor that’s putting out bad date, but not bad enough for the ECU to realize.
The setup requires 2 cables, which are available for around $25 combined, a PC with a USB port, and some charityware software called “HUD ECU Hacker”. This gives the same functionality as the $300 dealer code scanner for a fraction of the price.
In searching I found info about HUD ECU Hacker, but I have yet to see info anywhere about how to hook it up to a Hisun, so I took the leap and bought some cables, and made it work. I will show a step by step of how to do so in post two.
I will be breaking this down into 2 posts:
Delphi ECU Info & Overview (This post) System setup & use Delphi ECU Info (Skip ahead to the next post if your eyes glaze over technical details)
The Delphi MT-05 ECU was developed to allow small engines to use fuel injection. A fuel injection system requires feedback from various sensors to operate efficiently. This feedback allows the adjustment of ignition timing, fuel injection volume, etc to efficiently and cleanly produce the most power possible from a given engine.
The MT-05 ECU has a number of sensors that are required for proper functioning including; Coolant temp, crankshaft position, intake temp, intake pressure, exhaust O2, throttle position, as well as some other optional sensors that are used on more complex vehicles.
From the sensors the ECU adjusts: Fuel injector timing/pulse, Idle air control valve, and ignition coil
The Delphi MT-05 puts out diagnostic data, however it is not ODB2 like a modern car, where is where it gets tricky reading it. There are three options, there is an old 16 bit piece of software Delphi has that is not able to run on a modern computer, there is the motorscanner tool for dealers ($300), or there is freeware HUD ECU Hacker with the proper cables.
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By Paul L
When I am driving at 30 to 40 mph on the highway, the display will change from H (high) to R (reverse). It does not actually shift into reverse, it seems to shift into neutral and starts losing speed and the gas pedal has no effect. After the rpm/speed drops for 5 seconds or so, it changes back to H and runs fine for another minute or so. You have to try to drive it at less than 5000 rpm or so, to try and keep this from happening. Any ideas on what the problem might be? It only happens at the higher speeds.
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By Homeowner A
I was randomly and briefly able to connect to my Coleman UTV 400s ECU the other day twice and haven't been able to since. When I was able to access it, I found the following codes and wondered if anyone may know where I should start or what I should look at?
P0031 - O2 Sensor Heater Control Voltage Low
P0107 - Manifold Absolute Pressure/Barometer Pressure Voltage Low
P0113 - Intake Air Temperature Sensor Voltage High
P0118 - Engine Coolant Temperature Sensor Voltage High
P0650 - Malfunction Indicator Lamp (MIL) failure
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By Marie
Hello, we recently got a 2013 Hisun 800 as a little project for my husband and I to work on. Turns out the guys before us loved the mud anyway. We have replaced the stator and now going to do the Rectifier but here is the hold up as seen in the picture. There are tons of wires going to the battery. I cant seem to find anything that shows what wires should, or shouldn't be attached to the battery or where these 2 plugs go. if someone would please take some pics or share knowledge to where they go I would appreciate it greatly.
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