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2018 Hisun Sector 1000 Crew stalling but starts right back up. Please help!

Jon Spruill

By Jon Spruill
in Hisun UTV SxS Forum

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Jon Spruill Newbie

Jon Spruill

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Hey Guys, I have been chasing a stalling condition for about two weeks now. The bike will crank up and idle fine, then after about 20 seconds it will fall on its face and stall. It happens at both idle and while running at various rpms. You can turn the key off, turn it back on and it will fire right back up without trouble. I have verified spark on both cylinders with a spark tester. I have also added an inline fuel filter, and pulled the injectors to verify proper pulse on each. Things I have replaced - (relearn procedure performed after each component replaced): spark plugs, ECU, relay/fuse box, fuel pump, & throttle position sensor - all with no improvement of the condition. The only warning light I get when the condition occurs is the oil lamp. The bike only has 14 miles. I am at a loss and appreciate any help and suggestions! Thanks

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aefron88 Community Regular

aefron88

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What do you mean by "relearn procedure"? ECU reset? How did you perform this?

Did this start with an outdoor temperature change? IE it ran fine when it was warmer out but now that it's cold it dies at idle.

If you give it a little gas does it stay running?

I'm wondering if the coolant temp sensor might be giving a false reading which would adjust the fuel map to where it won't idle

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Jon Spruill Newbie

Jon Spruill

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The ECU relearn procedure is done by holding the accelerator to WOT for 3-5 seconds and cutting the key off while @ WOT. I don't believe temperature is affecting it, I live in MS. The bike while die at any range in RPMS and giving it gas does not help keep it running. It just suddenly dies. No symptoms to lead me to believe it is a rich/lean condition or poor idle speed. Just shuts off but can turn the key off and back on and it fires right back up until it stalls again.

 

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Pop Bob Explorer

Pop Bob

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I guess I’m thinking along the same line as Motojoe. Does the oil light precede the shutdown, occur with shutdown or come on after the engine quits. In view of all the components you’ve replaced, I’d be looking hard at sensors. The more of these kind of problems I hear about, I think I’m going to invest in a code reader. Hope you saved all your old stuff for possible future use or sale. 
Pop Bob

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jblack Newbie

jblack

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On 1/9/2023 at 11:40 PM, Jon Spruill said:

Hey Guys, I have been chasing a stalling condition for about two weeks now. The bike will crank up and idle fine, then after about 20 seconds it will fall on its face and stall. It happens at both idle and while running at various rpms. You can turn the key off, turn it back on and it will fire right back up without trouble. I have verified spark on both cylinders with a spark tester. I have also added an inline fuel filter, and pulled the injectors to verify proper pulse on each. Things I have replaced - (relearn procedure performed after each component replaced): spark plugs, ECU, relay/fuse box, fuel pump, & throttle position sensor - all with no improvement of the condition. The only warning light I get when the condition occurs is the oil lamp. The bike only has 14 miles. I am at a loss and appreciate any help and suggestions! Thanks

Hey do me a favor and unplug both

your O2 sensors and let me know if it stops stalling 

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jblack Newbie

jblack

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On 9/29/2024 at 11:55 AM, Pop Bob said:

I guess I’m thinking along the same line as Motojoe. Does the oil light precede the shutdown, occur with shutdown or come on after the engine quits. In view of all the components you’ve replaced, I’d be looking hard at sensors. The more of these kind of problems I hear about, I think I’m going to invest in a code reader. Hope you saved all your old stuff for possible future use or sale. 
Pop Bob

Do me a favor and unplug both O2 sensors and let me know if it stays running 

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jblack Newbie

jblack

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On 9/28/2024 at 11:55 PM, jblack said:
On 9/29/2024 at 11:55 AM, Pop Bob said:

I guess I’m thinking along the same line as Motojoe. Does the oil light precede the shutdown, occur with shutdown or come on after the engine quits. In view of all the components you’ve replaced, I’d be looking hard at sensors. The more of these kind of problems I hear about, I think I’m going to invest in a code reader. Hope you saved all your old stuff for possible future use or sale. 
Pop Bob

Unplug both O2 sensor and please let me know if it stays running 

 

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