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-   -   2009 fe390 weak spark spark falling off (http://husaberg.org/electrical/24537-2009-fe390-weak-spark-spark-falling-off.html)

magnumsmydog September 22nd, 2017 04:20 PM

the bike just started cutting out and slowly got to where it just wint run it will hit once in awhile and run for a second once in awhile other than that weak weak spark then spark dies if u keep cranking it after 5 seconds

magnumsmydog September 22nd, 2017 04:21 PM

the ohms were right on the coil but it also has continuity between the ground and voltage input

magnumsmydog September 27th, 2017 05:52 PM

well thanks to you all i feel as if im nearing the end of a year end battle. i have found the plug boot and wire are definitely letting it arc all over and while cranking and twisting boot it fire more often. next on the list is i think thier is a fuel problem as im not seeing any mist in throttle body while cranking. the fuel pump had been replaced with a factory one long ago. i hear it whine but not putting out much pressure. tomorrows goal is to diagnose the fuel system and hopefully get it squirting gas. :eek:

jon andersson September 28th, 2017 09:05 AM

If you open the throttle to see the spray the ecu cuts the fuel. It will only give fuel with closed throttle when it's not running.

magnumsmydog September 28th, 2017 10:00 AM

just keeps getting more complex haha, but i sure love a berg when its right

magnumsmydog September 28th, 2017 05:10 PM

guess i should start by setting tps

jon andersson September 29th, 2017 01:27 AM

Yes tps is good to check. Did you change the sparkplug and sparkplug boot?

magnumsmydog September 29th, 2017 02:05 PM

just picked up new coil and boot today

magnumsmydog September 29th, 2017 02:06 PM

and plug is new

fe390vt October 4th, 2017 04:06 AM

No spark
 
Sounds to me like your tps is fried. Know anyone with a fuel injected ktm? Swap out tps. You will need a multimeter to reset, but should work regardless.

As previously stated... bad plug cap, sometimes bad plug wire. Plug wire can arc to rads if damaged. Test: turn off lights off in garage, spray water around plug wire, start, you will see it arc. Bike will run poorly or cut out during water crossings. I have also had to snip off part of wire where it meets cap because of rusting. You ride alot of wet stuff?


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