My Revo has never run right. It will start and run for a minute or two and then just die. It has done this since initial break in. I broke the engine in exactly according to the manuel,( or at least tried to, it would'nt stay running long enough to go through a full tank). I have had really experienced nitro racers try tuning it, no luck. Things I have replaced: opti drive, wiring harness, 15 glow plugs, pipe, fuel line, close ratio gears in tranny, and most recently the engine. When I broke in the new engine everything was working perfectly for the first four tanks of break in, then it all started again! On the final tank of break in it died and hasn't run since. The temp of either motor has never been over 240. Please help

thanks, it was the one way bearing!