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By Jeff freeman
I have a Coleman 550. Was having problems to start with where it would start and then shut off after a couple tries. It would take off and be good. It then got to a point where it would not start at all. I replaced the fuel injection twice the second time I replaced it I noticed a mouse or something had chewed one of the wires that connect the electrical to the fuel injector. . So two-part question first does anybody have a part number for that wire harness? Second, any other ideas after I fix the wire harness permanently on what could keep it from starting I have gas flow up to the fuel injector.
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By riggy400
Bought a Coleman 400 UTV (pretty much a Hisun), the previous owner tried to replace the timing chain, couldn't time it properly and sold it to me. After some hours I figured out how the timing all is supposed to be set (I think/hope) and as I am reassembling, I noticed that the water pump gear was awfully hard to spin. I held the gear with my hand and spun off the impeller. I checked the bearing, spins great no obvious issues noticed other than this o-ring which seems to be out of place? When I remove this o-ring and reassemble the WP, it seems to spin nice and easy without a drag. I looked up the service manual (although very inaccurate info there often) and don't see this o-ring present. Am I missing something here or what? Any input?
This is not easy to access once the engine is back in the machine so would like to avoid having to deal with this if it becomes a problem.
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By jugliner
I have a fuel injected UT400 that will start and idle, but surges and sputters at higher speed. It has been sitting for 2-3 months and was fine when parked in garage. I assumed it was a fuel/air problem and pulled the throttle body and cleaned it up. I've ended up replacing the injector, IAC valve, MAF Temp Pressure Sensor, and fuel filter. I've also checked the spark plug, Still surging. I reset the ECU after every component swap.
I plan to pull the throttle body again and look evrything over for any visible leaks, etc.
Any suggestions would be appreciated on next steps. The problem developing after sitting makes me think it should be something simple, but I'm stumped. BTW the fuel was fresh and treated with Stabil.
Thanks.
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By AlphaSerenity
Hello,
Before I invest $10k+ into a brand new UTV for the farm, I want to get my feet wet with a fixer upper and learn the mechanical side of things. I acquired a 2022 Hisun Axis 500 (Lowes-specific model) from an auction for $500. It has only 200 hours and 120 miles on the engine. It looks like the previous owner used it for ranch work and didn't drive it on trails, deep water/mud, or anything too crazy.
While it runs and moves, it has some problems. It struggles to accelerate up any incline in high and low range and sometimes stalls when I let off of the throttle or change gears. When I apply throttle in neutral, it sounds like it is struggling for fuel/air and pops. When I decelerate, there is a grinding sound coming from the clutch, which I've read to be related to the one way bearing and is semi-common. The last thing I've observed is sometimes the speedometer display sometimes will show a much higher value for a few seconds after barely touching the throttle. Based on the documentation, if a problem is detected from the sensors, the instrument panel display should have an error code rendered on the screen in place of the time, but this isn't happening. Here is a video showing some of these issues (engine is exposed with console removed):
https://www.youtube.com/watch?v=FFAkO5TaGps
Here is another video of the clutches in action:
I've done some research, but information on this specific unit and sister units is limited. There does seem to be transmission and clutch issues reported. I still need to check into the head gaskets. I don't have the equipment to test compression right now, but I do plan on ordering what is needed soon. I do have an order in place for some cables to read the diagnostics from the computer. There is a shop two hours away from me that works on Hisun products, but I am hoping the problem can be identified and is something within my ability to handle. Below is what I've already investigated. I am leaning towards the primary clutch needing replacement right now.
After getting it home and unloaded, I did the following maintenance/checks to it prior to operating it further:
Changed the engine/clutch oil (and filter) and gear oils using manufacture recommended viscosity Changed the air filter and checked for cracks in the air intake flow. Verified good suction. Cleaned the throttle body Changed the spark plug and verified the gap was within spec (0.6-0.7mm) Changed the coil and coil wire Changed the fuel lines, fuel injector, and verified the fuel pump was outputting the correct initial prime pressure for ignition and continuous pressure after ignition. Also completely emptied the fuel tank and made sure octane 91+ fuel is being used per manufacturer specs. Ran seafoam through system too. Cleaned the spark arrester and verified no cracks or gaps in the exhaust flow Changed out the O2 sensor Checked all wired connections to ensure they were secured and no breaks were visible Checked the belt for tightness and for any signs of wear and tear Verified 4WD and the differential lock function as expected - still hesitates and struggles uphill Verified the fan gears in the shifter are not corroded and working as expected ECU was reset after replacing sensors and fuel-related parts
Thanks!
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By bcorneliusen
Hi,
I have recently inherited a 2017 Mahindra mpact 1000 S Diesel flexhauler. The small silver-bezeled indicator gauge on the dash is no longer working since the wires were accidentally pulled from the back. I have managed to connect the correct wires for the seatbelt safety but most are still unplugged. Any pics or a wiring diagram for that gauge would be helpful.
Thanks!
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