Iamfreebird05

Alrighty... bought a F2.. either a 92 or 91 and it ran perfect not too long ago right up until i tried getting all around working lights on it for transportation and now it seems that it may be arc-ing somewhere? When i goose it she seems to hit almost what seems like a rev limiter and pop like popcorn without gettin tached out... Any ideas? gonna pull an all nighter tryin to get her runnin right again but im assuming its something that i did seems how it ran fine before and now the problem has occured...