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By redneckred
I have a 2012 Bennche Bighorn 700X. I bought it used. It had been sitting in a field for several years untouched. I put a new sun gear in the shifter, new shifter linkage due to the old one having been patched, and a new battery (and of course fresh fuel). The machine cranked and ran beautifully. I had it over a year and then the machine quit running. As it would not stay cranked, I narrowed the problem down to a bad IAC valve. I replaced it and it ran as good as new/old. Fast forward, the machine started to act like reverse wasn't catching and would not always back up when in gear. Then forward quit. I assumed a bad CVT belt and got one. Started removing the bolts from the cover and (3) just turn in the housing without coming loose. (2) are on the bottom, so very little room to do anything with them. I tried cranking the machine again to see the belt move since I can move the cover enough to see the belt and now the machine will not crank. It turns over fine. It gets gas to the injector and has spark. I can spray cleaner down her throat and she would run until it ran out. I have replaced the IAC twice and put a new injector with no change. I went out and put the old injector back in to see if that made any difference and, well, it did. I tried to crank the machine and the starter is stuck trying to turn the machine over even with the key off. I have to disconnect the battery to stop it. Before I shoot this thing, what am I missing? Is this an ECM problem or something else I am not seeing? Been dealing with these Gremlins for over a month now and weeds are starting to overtake the motor due to it not moving. I would love to get the thing running first and any ideas of getting those CVT cover bolts out would be extremely helpful. Thanks in advance.
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By Kingfish
The conversion took about 350lbs. off the vehicle. It never rode great, but now I feel every crack in the road. I have backed off spring compression nut to the point just under where they would move around if suspension was at full extension, but it is still very stiff. I would like to put some softer coilover springs on it, but I have no idea what the spring rate is with the original springs so I would just be guessing on what to order. Does anyone have the data for the original spring compression rate? I am willing to give up a little ground clearance for a softer ride. Right now when sitting still the rear suspension is at or near full extension and the rear tires have several degrees of camber which will cause uneven wear if allowed to continue in this state.
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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 Angstadt
Hi everybody. I just bought a 2012 Hisun with the 700cc engine. Was wondering where i could find a service manual for this thing?
Its going to need some parts that are missing, like the air intake hoses and other things. Also the dash display is out. the only light that works is neutral light. Not even sure on the model. from pics I've seen, it looks like an HS700. Kind of grey with the black stripes on the hood. Just hoping i can find parts for it.
Thank you for any advice you can give me. By the way, it does run and goes forward and reverse.
Paul
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