Ok I was trying to break in my MGT today. It is -8 degrees C outside so that like 24 F I think. I set the needels for breakin according to the manual and heated the engine head up with a heat gun untill it was pretty hot. It started very easily after I truned the idel speed up a bit and I started moving forward. The truck ran well up and down the street nice and slow then it started to speed up and slow down and then speed up alot with no imput from me so I ran out and grabbed it as it drove by me and i got it just bfore it went nuts and was like WOT. The servos and stuff are not gitchy and it definatly was not overheated because it was only warm to the touch but it was surging just like when u overheat a nitro. I think perhaps this is a result of the engine being too cold because it was cooler than it was when i heated it with the gun. But i am pretty sure it is some sort of tuning or temp issue and not an electronic issue. Any imput would be appreciated.