voodooph hit it on the head. If for some strange reason you remove things from your car after every race, eventually, one of the connections to the transcap module can break...be it from wear and tear, age or possibly heat (think of wires getting hot and eventually eroding away). This was happening to me. Not realizing why my car sputtered at low throttle, I chalked it up to an old solder joint. Upon close inspection, realizing that all joints were good, I looked to other paths of electric flow and voila, discovered that one of the "leads" that goes into the back of the transcap was broken! Simple fix, break out the 25 watt, lil bit of solder, tap tap, dry..cool then test. This should be the fix (if thats the problem.). If not, try the novak glitch buster..nothing but an additional cap that plugs into the aux in your rx...giving your car a "jolt" when needed.