Hey, i had lots of problems tuning my alpha trainer, when i got it last year. Im still learning to tune my rc engiines.I might be wrong wrong but maybe you just need some experianced help. dissregard this if you allready have had some. I still ask guys at our field " is that the high end or low end causing that? think its rich or too lean?" btw i have my evolution trainer engine in my slowpoke now, pulls it very well. good luck