I recently bought an 2007 M8, i added the RKT kit / green spring. Seemed like it worked pretty good at first but then I ran into some primary problems. I put a new primary on and took it for a ride. it seems like often it wants to go into neutral if i push it hard. works ok if i feather the throttle but as soon as I hold it open it lets go. It also does the same when I go into the soft stuff. Can anyone tell me what might be wrong.