adjusting the fmu

ok i did a search and did not find the answer i needed.i have the stock fmu that came with novi1k....the one last year...is there any way i can lean it out.i am using all stock fuel system except for the adj.fpr it is a holley..,and now in 2nd gear it wants to bog down alittle then all of a suddne shoot off like a bat out of hell? and in a higher gear i f i step on it instead of stumbling it backfires through the exhaust system....it had ran fine for months.but now i cant figure it out...is 11* to much to run the timing without a timin retard system hooked up

Here ya go:

http://www.novipower.com/forums/show...&highlight=fmu