ok here is the deal I got a couple of cars at a yard sale and have peiced them together. one seems to work fine the other is another story. It is a tmaxx 2.5 that I have put some left over servos in to get it running two are Hitec the other is a duratec, and the stock traxxas reciver. the radio and is 2chan the recive is 3 so i just figured no reverse. the problem is the throttle servo will just randomly swing. it does it more if I use the easy start but gets real bad if I hook up a normal glowplug heater. any thoughts