Hisun 800 no spark

[Steve Varao]

HI All,

I have an 800cc Hisun fuel injected twin cylinder. Im trying to diagnose a no spark issue.  I had a bad crank sensor, replaced that and still got no spark and yes i doubled check the new one to make sure it was good.  Checked the both coil packs and they are both receiving power, also checked the resistance and both seem to be good.  It seems to me like the ECU is not sending the signal to the Coil packs.  Anyone have any idea how to test the ECU?  Any help or advice would be appreciated.  Thanks

[Travis]

Battery ignition like a car or  does it use coils and magnets on the flywheel?

[Steve Varao]

It has two coil packs, one for each cylinder and a crank position sensor.  I have already replaced the crank position sensor and double checked the ohm readings.  I have also checked the Coil packs and they both have identical resistance readings.  I cannot find a value for the coil packs but since they both read identically I'm leaning tword them being ok.  I also have 12v to the wires connecting to them.  

[Jody l]

Same no spark problem on my Hisun 800. Anyone figure this out ??

[scott ryan]

Not sure about your specific model or even how they work, but maybe check parking brake switch/sensor.  Just a guess.

[kenfain]

I assume that it's designed to not start while in gear. Has anyone thought to check that particular sensor? Or the seat sensor, if so equipped?

[Jody l]

Yes neutral light comes on and it spins over, just no fire to the plugs. Already changed crank sensor.

[kenfain]

Have you checked all the fuses, or relay, specifically the one that provides power to the coils?

If all is good there, and you've replaced the crank position sensor. That doesn't leave much in a no spark condition, except for the CPU. 

 

[Jody l]

I checked wires going to coil, I get 12 volts on one of the wires  when I turn the ignition on . Checked all fuses, dont know if there is anyway to check all the relays. I'm ordering new cpu today.

[Jody l]

Anyone know which numbers need to match on the new ecm ?? I found one with the MT05 but the rest of the numbers dont match

 

[kenfain]

Does the vehicle have more than one relay? On most cars, if there's more than one, you can interchange them from a known working circuit. 

It's been a few years, but I'm pretty sure that they can be tested fairly easily. I've always had good luck using the above method for diagnosis. 

I'd certainly want to eliminate all other possible causes before putting out the money for a new processor. 

[Jody l]

It does, I switched them around but didn't make a difference.  I'm looking at new ecm fron $80 - $150.  Alot of them say for hisun 800 but have different numbers.

[kenfain]

Different numbers sounds like it might be for the different years, or different models maybe. Is this new from the manufacturer? Or a seller on Ebay?

[Jody l]

Just wanted to give update . It was the ecm. Put new one on and got spark immediately to front cylinder.  Ran but smoking and no power. I checked back cylinder and no fire. Pulled coil to check with meter and found wire was not getting good connection where it plugs into coil. All good now . She will scream !!!. Next is to figure out why 4x4 switch wont turn.  Thanks for all the imput....

 

[lm340_0]

Replace the crankcae sensor crank trigger. 

[Laubrey]

I have replaced all the above.  Still no spark

[AliasDave]

Laubrey, did you ever get this resolved? I'm having a similar issue and trying to troubleshoot. I've checked pretty much everything, even back-probed the ECU and things look fine, but no spark.
Thanks in advance, Dave