hello, I bought a 08 nightster in OCTOBER, and Have been making it my own this winter, And I think that I am having some issues with the EFI??I have a 90 Deg k&N intake,V&H shorts shots staggerd, and the fuelpak, IHave it set to the FP0681 program wich is what the directions state to use, But Ihave lots of white smoke, going from idle to 1/4 throttle, then at 1/4-1/2 throttle flames popping and very rough, then at higher RPM black smoke(a little bit). V&H guys say there must be something else wrong. I wanted them to give some sort of map for what each value does, in relation to the throttle position, is this avalible?? or will I have to make it up myself!! Also I don't know a whole lot about EFI but it is my understanding that alltitude and temp do not matter that much?? Anyway has anybody heard of such a problem??Or is it supposed to keep the bugs away??

Thanks,
chad

 

I think I read somewhere that it has to do with the throttle position setting. I could be wrong though. Have you tried to reset that value?

PHAT

 

yes I have reset the throttle position sensor a couple times now.