2022 Sector 750 EPS starting issues

[GunnersTacklebox]

Hi All,

New here, but bought a 2022 Sector 750 brand new last march (old stock up here in Canada)

It's a good bike so far, but I have noticed a quirk and was wondering if anyone else has had a similar issue?

 

The issue I've had is if I leave the utv parked on any incline, not even a major incline, and leave it to sit for a while (day or two) it will not start properly. It will turn over and not fire until I press the gas pedal, when it will run and rev up, but if I let off the gas it will die. It will keep doing this until I either start it in gear and drive it for a bit or leave it in neutral and roll it down the hill to flatter ground. where it will have to sit for a while. 

If I park it on a decline there is no issue. fuel is not low, it's occurred a couple times now. 

 

Any thoughts on the cause of this? Dealership just says bring it in and let them take a look, at my expense of course. 

[nods]

I would check for fuel contamination, water or too much ethanol in bottom of tank. I have a Hisun tech coming Monday to check my 2022 sector for that condition, mine loses power going up my long-inclined driveway.

nods

[HighSon]

Any new info on this problem?

[nods]

Well, it was interesting to watch the road tech replace EVERYTHING;  the fuel pump and sender assembly, new fuel lines, fuel filter, Injector, HEGO, TPS, and IAC. One thing he was talking about the most is water/ethanol contamination, which would settle out to the bottom of the fuel tank when parked for a day or more. Once driven it would mix in the tank and the severity of the problem would go away. He looked in my tank and really didn't see this in mine, although there seemed to be like water marks in the very bottom of the tank. He wiped it out and then filled it with premium fuel that has no ethanol. My running concern has gone away, and the unit runs really very nice now. Of course, having that many parts replaced is like a shotgun blast, hard to miss. I did end up with another electrical problem just before this last repair. it was supposed to have been fixed and was not! It is intermittent short in the main loom, (the engine loom was already replaced for another issue.) When driven on the road about 1 mile the fuse for the signal lights blows. Have no brake lights or turn signals and causes feedback in the instrument display. Hisun picked it up yesterday to take it back to Texas to replace the main loom that was supposed to have been replaced 3 months ago.

So, I guess the bottom line is check for fuel contamination. Do not use fuel that has ethanol added! The fuel pump retaining ring on the tank is really tight, watched the tech bust a sweat trying to get it off then back on, he was a very BIG dude and was using a very special tool.

You might try to get a gas sample after letting it for a couple of days in the position that gives you the worst starting problem, check for obvious contamination and then google how to check for ethanol in gas. If you find any fuel issues, make sure you replace the fuel filter. 

Hope my ramblings help you.

NOD

[HighSon]

Thanks, very useful information. 

[Ricanuck]

Just came across this thread ...

I have a 2020 Hisun Sector 750 (bought new in Jan. 2021). I must be one of the lucky Hisun owners given I've had only a few minor problems. I haven't experienced any starting issues and my UTV sits idle from mid-Oct. to mid-Apr. with a full tank of gas, and not hooked up to a battery maintainer. However, I only use premium fuel and always add fuel stabilizer to every tankful.

I do this also for all my small engines - chainsaws, lawnmower, lawn tractor, log splitter, etc based on the advice of an oldtimer years ago. Haven't had a fuel-related issue in years.