Quantcast
Jump to content


2019 Hisun Sector 550 Hard Starting


Go to solution Solved by kgs,

Recommended Posts

Posted

Got a hisun sector 550 2019 that's got 5900 Miles on it, this year it started to getting hard to start in morning, once I get it started it works good the rest of the day. But to start it in the morning I got to hold the gas pedal to the floor and it will fire up. I replaced the fuel injector but didn't help it. So I just ordered a new air filter and 02 sensor and a maf sensor to put on it to see if this will fix it. Anyone else had this problem. I'm hoping the parts I ordered will fix it. I also bought a new battery to put in it also.

  • Alex changed the title to 2019 Hisun Sector 550 Hard Starting
Posted

Any help on this at all would help thanks, I bought OEM parts to put on it. My next thing to check if this don't work is check my valves to see if they need adjusted, but taking the cover off to rotate motor looks like a pain in the but to get to.

Posted

I would check the valves and replace fuel filter before throwing parts at it.

The fan cover isn't that bad, and you can get away with just pulling the top bolts and flexing it a little.

Pull the spark plug and the engine is easy to spin by hand.

Posted

Well turning motor fan counterclockwise until valve is at top then move fan another 3/4 turn to make sure the lobe is off valve. I don't have any room at all to put a gage in It. seems like it keeps contact and no opening. Would this cause it hard to start but run fine once started.

Posted

I think I'm going to put it back together and see about taking it to a shop and let them adjust them. I don't want to mess something up. I have rotated piston up two different times to check clearance on the up stroke and I can't get a gauge in but the motor is cold.

Posted

You may very well have zero lash. Back off the adjusters and go from there. As long as it's off the cam lobe you should be ok to adjust em.

 

Yes this may cause a hard/no start situationnloss of power, poor runbing, etc. If the valves are slightly open you will loose compression.

Posted

When I took my plug out it was toast, changed it last summer. You can see it's running rich. I put it back together and it fired up a lot easier with new plug, but I know the valves need adjusted there is 5900 miles on it. So there is only two valves intake and exhaust, so if I have my pistol dead top of stroke with valve up then it's ready to loosen and adjust, then repeat for next valve, I just want to make sure I don't want to do something wrong and it won't run. Probably don't need the part's I ordered but I will keep them. Here's picture of old plug.

IMG_20221015_134520187.jpg

Posted

Well adjusted the valves to 5 thousands, now it runs like when I first bought it. Turn the key fires right up and idols on it's own, very happy man. Thanks for all the help.

Posted

So if you have a hisun sector 550 it's a 4 stroke, which means the piston goes up twice before you get the compression stroke. Set piston TDC on compression stroke then adjust both valves to 5 thousands clearance. My utv runs like the day I bought it from this fix. 

Posted

Yes I hope I do, I only use it to haul corn to feed deer, so it don't get abused driving it hard in woods. I've been told the motor in the sector 550 is the same motor in the sector 750 and supposed to be a good motor in the hisun utvs.

  • 11 months later...
Posted
On 10/14/2022 at 2:08 PM, kgs said:

Got a hisun sector 550 2019 that's got 5900 Miles on it, this year it started to getting hard to start in morning, once I get it started it works good the rest of the day. But to start it in the morning I got to hold the gas pedal to the floor and it will fire up. I replaced the fuel injector but didn't help it. So I just ordered a new air filter and 02 sensor and a maf sensor to put on it to see if this will fix it. Anyone else had this problem. I'm hoping the parts I ordered will fix it. I also bought a new battery to put in it also.

I have the same issue with mine right now done change the same parts and no luck if you happen to figure it out help would be appreciated 

  • Solution
Posted

I had the same problem, it was my valves that got to tight.

Adjusted both valves to 3 thousands and now starts right up and idols good.

  • 7 months later...
  • 3 weeks later...

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Similar Topics

    • By CapnWalleye
      Just picked up a Hisun 500 that had shift issues (corroded fan gear) which I fixed. It also didn't seem to be running smoothly then all of a sudden it got worse. It seems to miss on both idle and when pushing the gas pedal to the floor and doesn't seem to be running at full power. I've been working with a local person who is walking me through some steps, but I'd like some input from this group as well. What I've done:
      - drained the fuel tank and replaced it with 93 octane fuel and added heet to help with any water problems.
      - replaced the fuel injector.
      - disconnected the battery (several times) to allow the module to reset.
      - set the valve clearance, both intake and exhaust, within specs ... intake was tight but exhaust seemed fine.
      - replaced the battery.
      - replaced the O2 sensor.
      Nothing has helped. Not sure what the next steps are, but would appreciate any expertise that can be offered here.
       
    • By Gorj
      I am going to replace the batteries in my E1. I am not interested in the high cost Lithium or the expensive 6 volt dry batteries.  I am considering four 12 volt deep charge marine batteries. I have a source for 810 amp units for about $100 each.  I have no worries about reprograming the charger because it went out a few years ago and I replaced it with generic golf cart charger. When I decide to do this, I'll keep you posted on the results.
    • By Homeowner A
      Is there a code reader available for the Coleman UTV 400?  I tried using the HUD ECU Hacker software and cables/adapters but no luck OBD to delphi 6 pin and KKL VAG as well as ELM327.  Will not connect.  I was able to get it to connect randomly a couple of times, but haven't been able to since.  I was able to clear and read the codes briefly.  I'm aware of the Tiny Scan 301 but it doesn't seem to be readily available.  There's a few out there but they are expensive.  
    • By Marie
      hello, i need help figuring out where all these wires go on this battery. I can't seem to find any pictures diagrams. As to what should or shouldn't be attached and where these two plugs go, that aren't plugged in. this was got as a project. would run then die and battery would have to be jumped off to start again stator has now been replaced but any help with this wiring would be appreciated. 
    • By Prepper
      I'm working with a 2015 MSU-500.  Basic symptoms are it cranks well, but will not fire.  It has spark, and it has fuel spraying out of the injector (and spraying starting fluid into the throttle body and plug hole makes no difference).  It has compression.  I bought it not running, and no other information was available.  It has 775 miles on it and 127 hours.  It looks to be in very good shape.   Previous owner replaced fuel pump, ECU, coil, plug, and the fuse/relay box that mounts on the firewall, then gave up.
      My questions relate to cam/valve timing, considering the symptoms and diagnostics so far.  My thinking was the woodruff key sheared off and the crank spun, making it out of time.  My question is, by the pictures attached does anyone have an opinion as to the cam/valve timing being correct?  In the crankshaft picture you can see a timing mark visible.  In the camshaft picture I have arrows directed towards what I think are timing marks (which appear to be exactly 180 degrees from one another).  However, the long arrow in what appears to be bolt configuration in line with the piston/rod line.  Here is a puzzling note... in the position you see in the pictures... I have valve lash on both the intake and exhaust.  I think it's at TDC, given the visible crank timing mark and valve lash on both valves. 
      Any thoughts ?  Does this appear to be in proper valve time ?  Have I missed anything simple ?  Thanks in advance for your input.


×
×
  • Create New...