five0fm

hey guys im not sure if you read my last few posts but im having a really hard time getting this engine to idle again. it idled fine then all of the sudden boom...wont idle for anything..ive tried resetting things and what not and i also tried retiming it. it was originally set at 20* and it ran pretty good...we figured we would try to lower it and maybe it would help our idle problem. right now its set at about 15*. im wondering if anyone has any idea what i should set timing at to start. 10* like a 5.0?