Studder Studder pop pop dead

[donkeyboy]

first time poster but been on the site for some time... so here is my problem... last night my buddy and i rode to CT about hour and a half ride... and right before we got to his girls house my bike studders like crazy then stalled out... started back up and ran fine the next 20 miles or so... when we started to get back to the highway it started to hesitate again... over the next 70 miles or so i came to realize the following symptoms... 1)when i hit bumps or used anything more than featherlight throttle it would wanna choke out...2)the speedo would flutter about 5 mph before it would start to act up and 3)if i stopped for just 2 minutes it would be ok for about 5 minutes and then act up here and there... it seemed to be happiest on smooth roads doing about 60-65 with almost no throttle, but once i gave it some gas studder studder pop pop dead!!! but the studder and backfires were not only shooting fireballs from the muffler but was pretty violent before it would shut off... so this morning i checked all the grounds and plug wires ect... im thinking its the coil from what i have read... just looking for some more feedback... bike is a 2003 xb9 lightning with the following mods : Open air box w/ K&N, breather mod, Buell Race ECM, Hawk Muffler, and bunch of other non performance mods... 7100 miles on the clock... oil recently changed and have been through 2 tanks of gas.. still doing it on a side note... when i installed my HID kit... i found after doing the both lights on mod when switching to high beams every once in a while i would studder quick.. im guessing the lights drawing power for a split second... and that quick studder is the same studder but much worse i am experiencing now... this is why i feel it is spark related... thanks for your help!

 

[Paniller]

I'd check your grounds, then the stator thing. I'd bet on a loose ground.

 

[Stevenc150]

Since it did it during bumps, accel. and such - I'd say you've got a ground/negative losing contact when those occur. I'm like Pan, you should have a loose Battery terminal, Frame ground, etc somewhere. Could even be a fuse ready to fall out or anything.

 

[Hammel13]

yea i would have to agree with Pan and Steve. Also i dont think that lights would cause much interferance unless they are not installed corrctly. No offense.

 

[donkeyboy]

i checked all the grounds and all the fuses as for the lights they are set up just like every other HID kit on the forums i have seen... when the ballast draws the power for the high to kick on 50 percent of the time i get a small hiccup... but being bump sensitive i def thought ground also but every ground i see is solid

 

[donkeyboy]

just ran all the diagnostics on ECMspy for the fuel pump injectors coils ect... everything says its fine... checked all the electrical connections / ground ... also reset the tps again and no different... still breaking up and stalling out pretty bad ... dont wanna order useless parts...

 

[donkeyboy]

so i took apart the coil plug and wire set up... cleaned all the connections and checked everything out... once everything was put back together the bike can almost not be riden... being that i only messed with one thing and it got worse after i went ahead and ordered new plugs/wires/and coil from iron machine be here friday i will let everyone know how i make out

 

[Stevenc150]

Hope it sorts everything out for you, yes do let us know.

 

[Art]

my 03 just started doing the same thing and what is even more weird is around the same miles. Mine seems to come and go though!

 

[2003buellxb9s]

I bet it's the coil. Mine is starting to do the same thing FOR THE THIRD TIME! Also a 2003 lightning. I've replaced the coil twice now. So pissed.