I have been experiencing a weird problem lately. When ever i take off fast and get up to about 4000 rpms or so or just get hard on the gas my car falls flat on its face and loses all power. It doesnt really do it when i'm just driving around slow though too much. I dont drive my car everyday and its been sitting for the past month or so driving occassionally. I recently did the UIM/LIM cleaning to try and fix it to no avail. I did the IMRC check and its fucntioning properly so any ideas of what else it could be? TIA.