My engine keeps cutting out. Like I will be giving the engine full throttle and then the engine will stop giving it throttle, and then it will give it throttle. So the car sounds like this. rrrrrrrr rrrrrrrrrrrrr rrrrrrrrr rrrrrrrrrr. Its really annoying. I changed glow plug, changes batteries, flooded my carb to try and see if I could remove and debris inside of it, checked to make sure my receiever was receieving, leaned it, richened it, higher idle, lower idle. What should I try now. I just installed a failsafe prior to that day of use and set the failsafe to just idle the engine whenever it looses signal. I'm going to remove the failsafe and see if I have a defective failsafe. Also My freaking steering servo twitches like crazy whenever I give the car throttle. Its so bad that it can turn the wheels all the way in one direction. I have no idea what is going on.