back fire after top end rebuild

[channonmanuel]

I'm not sure if this would work or not but is it possible to power up the sled with a 12v battery and then try to start it to see if it will show a code? I know on my pro there's an ecu plug in the harness by belt and you can power up the sled? Maybe can save you a few bucks.


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[moto5151]

Alot of work to start from scratch. But it eases the mind. You said you had a ecu plug the was loose, and managed to get spark back. Really look into that plug harness again. Any pushed in pins on the plug? I think you are on the right track. If I remember correctly, Theres a harness on the dragon that always fails. Not sure if that was specific to the 900 or all. I think its backfiring because it's loading with fuel then backfiring when it does get the sporadic spark.

 

[geelak900]

Are you sure it's getting fuel? Did you prime the fuel pump? There is a plug you need to apply 12V to and it will prime the fuel system. There is also a plug to power up the ecu. Both plugs are down on the front left side by the pipe. If you have a manual it will show you which is which. The fuel prime is a two wire plug, the ecu is a three wire. Make sure you do it correctly. I don't think powering up the ECU will show you any codes. It should start and idle even if there is a trouble code.