I thought there was a thread on this somewhere.But just to ease your mind lots of us have had our Pioneer do this. Its always say if your making it work and then back off the throttle suddenly [like take your foot off the gas] and try to step on it again is went it stalls. Mine will happen say if I'am pushing thru snow making it spin ,then back off real quick and step on it again it'll stall. I;ve gotten used to say back off the throttle easy and then giver again then its fine.