Hisun 550 engine sputters, no power.

[Randy Stevens]

I just started narrowing things down as suggested by many, electrical, air, fuel filters, fuel pump, oxygen sensor, then injector was last and it turned out to be culprit. Had white plastic shavings in it and was clogging the fuel flow and spray. It only had one injector! Hope this helps everyone!

[Mick]

I had to put a new injector in my 2019 Hisun 550 at only 250 miles. Now at almost 500 miles it started actin up again. Haven’t looked into it much yet as it just happened last night. But have heard that injectors a a big problem with these. 

[Randy Stevens]

14 hours ago, Mick said:

I had to put a new injector in my 2019 Hisun 550 at only 250 miles. Now at almost 500 miles it started actin up again. Haven’t looked into it much yet as it just happened last night. But have heard that injectors a a big problem with these. 

Hi Mick, after my first issue, mine started doing same thing, thus I pulled injector and throughly cleaned and blew it out, runs fine again. I’d suggest putting a new one in. They come with cheapo’s from China, but that’s not saying new ones are built there too but they are cheap in price. Check fuel pump assembly to make sure it has a filter to catch garbage being sucked up from gas tank. Should correct your problems. I’ve learned a lot about mine lately but it still runs great with a little maintenance!!

[kenfain]

15 hours ago, Mick said:

I had to put a new injector in my 2019 Hisun 550 at only 250 miles. Now at almost 500 miles it started actin up again. Haven’t looked into it much yet as it just happened last night. But have heard that injectors a a big problem with these. 

Welcome to the forum!

I don't know what the ethanol mix in your area is. But ethanol in the fuel can cause injector problems also. Not saying that it's the actual cause of your issue. But it's very possible. And certainly worth looking into. 

[Randy Stevens]

52 minutes ago, kenfain said:

Welcome to the forum!

I don't know what the ethanol mix in your area is. But ethanol in the fuel can cause injector problems also. Not saying that it's the actual cause of your issue. But it's very possible. And certainly worth looking into. 

I was told by mechanic that did first initial repair that these motors need  good grade fuel such as BP, Mobile Oil, Chevron, Shell etc,  plus a higher octane would improve performance greatly.

[Mick]

Ya I put a new pump in first and it had same pressure as the old one. Since the dealer did not know what the pressure was supposed to be. Then put new injector in n it’s been fine till bout week ago. Now acting the same way but won’t start at all now. Gonna look into it more tonight. Just real frustrating only having it for couple months n less then 500 miles. Plus the dealer says it be covered but they way behind n be like two hours away.  So guess we’ll see how it goes later.  And not sure of the methanol content here but have always run premium. 

[Randy Stevens]

Personally, ( & I own one) these thing are junk! The suspension and body/ frame and steering work well but the schematic on motor are worthless! Chinese crap but I’m like you... mines a 2019 with 400 miles. 3 weeks after I bought it, it was in shop for 2 months! I’m considering switching to carburetor for mine and do away with efi. Motor runs good when it runs!

[Randy Stevens]

Just now, Randy Stevens said:

Personally, ( & I own one) these thing are junk! The suspension and body/ frame and steering work well but the schematic on motor are worthless! Chinese crap but I’m like you... mines a 2019 with 400 miles. 3 weeks after I bought it, it was in shop for 2 months! I’m considering switching to carburetor for mine and do away with efi. Motor runs good when it runs!

Sorry, meant to say schematic on EFI are worthless. Motor runs fine

[Mick]

Ya when it runs u r right, rides steers n everything great, but I think they have serious fuel issues. One thing I noticed last time I put gas in it is there was mud in the threads of the gas cap?????  If mud got there where did the water go???  Gonna mess w it here in a few. I will keep ya all posted. 

[Mick]

Well looked into it. Have no injector pulse now.  Haven't been able to find much for wiring diagrams to look into it yet. Trying to avoid  taking back to the dealer knowing that they will have it for a while. Plus little faith in them since last time I had the problem with it I was talking with the lead mechanic there and he didn't even know what the fuel pressure was supposed to be or even all the injector problems that these machines have.  Sure I will end up having to take it there though.  

[kenfain]

19 minutes ago, Mick said:

Well looked into it. Have no injector pulse now.  Haven't been able to find much for wiring diagrams to look into it yet. Trying to avoid  taking back to the dealer knowing that they will have it for a while. Plus little faith in them since last time I had the problem with it I was talking with the lead mechanic there and he didn't even know what the fuel pressure was supposed to be or even all the injector problems that these machines have.  Sure I will end up having to take it there 

Is it showing any fault codes? 

[Mick]

Have no way to check codes?

[kenfain]

10 minutes ago, Mick said:

Have no way to check codes?

I think that on most machines, it makes the clock blink a sequence, that would indicate the actual code. Or there's a code reader available, but it would have to be the generic version. The one from Hisun is very expensive, considering what it is, and how little information it provides. 

It's just that your issue sounds like a crank, or cam position sensor. Or possibly the CPU itself. A fault code would provide invaluable help here.

[Mick]

Ok, do u know how to get the clock to blink to read the sequence? I am very familiar and experienced w these types of fuel injection system.  Also where is the diagnostic connector at?

[Travis]

i believe the clock should do it automatically when their is a fault

[kenfain]

8 minutes ago, Mick said:

Ok, do u know how to get the clock to blink to read the sequence? I am very familiar and experienced w these types of fuel injection system.  Also where is the diagnostic connector at?

My understanding about the blinking clock, is that it does it automatically. Whenever it encounters a fault. Fixing the problem is the only way to stop the blinking. So it sounds like it hasn't encountered a fault.

That's why I mentioned the CPU. If it were a position sensor, you would've definitely noticed, and likely mentioned the blinking clock. 

I have no idea where to find the code reader port. My guess would be that it's under the dash. All that I've seen on the reader, seem to indicate that it's a Delphi type.

Do you have a service manual? One of our members has been kind enough to offer free manuals to others. I know that he was providing manuals for the Massimo. You might see if he's able to provide the one for the Hisun. 

If you're interested, then hit Strike 250 with a p.m. and ask about availability. 

[Mick]

Thanks guys. It’s B late here but will look more into it tomorrow. Again thanks everyone. 

[Randy Stevens]

11 hours ago, kenfain said:

My understanding about the blinking clock, is that it does it automatically. Whenever it encounters a fault. Fixing the problem is the only way to stop the blinking. So it sounds like it hasn't encountered a fault.

That's why I mentioned the CPU. If it were a position sensor, you would've definitely noticed, and likely mentioned the blinking clock. 

I have no idea where to find the code reader port. My guess would be that it's under the dash. All that I've seen on the reader, seem to indicate that it's a Delphi type.

Do you have a service manual? One of our members has been kind enough to offer free manuals to others. I know that he was providing manuals for the Massimo. You might see if he's able to provide the one for the Hisun. 

If you're interested, then hit Strike 250 with a p.m. and ask about availability. 

I found a plug in port on mine under hood by radiator. Not sure if that the diagnostic port or just an adapter for power supply????

[Mick]

Travis, when is it that I should be counting the clock blinks?

[Ridge Runner]

Hi

Tiny Scan TS 301 will read the codes, I believe,

 

[Ridge Runner]

Hisun has a YouTube video that shows where the port is.... by the engine.  Tiny-Scan is same company as Tiny Tach.

[Mick]

Well for that price hopefully the dealer has one.  But thanks man. 

[Ridge Runner]

Thanks , I think they have a mini reader you use with your phone for around a hundred...  

[Mick]

Oh well that might not be so bad. Gonna call the dealer later n see what they have to say. Like I said only had it a few months n under 500 miles. Feel I already put enough money into it