magnumsmydog

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

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

magnumsmydog

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.

jon andersson

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

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

magnumsmydog

guess i should start by setting tps

jon andersson

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

magnumsmydog

just picked up new coil and boot today

magnumsmydog

and plug is new

fe390vt

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?