New Engine problems!

Last night I added a new super stock RZ engine I simply unsoldered the old and resoldered the new. Now it's all messed up. I give it throttle and it delays then keeps going after i let go it sometimes randomly goes reverse and sputters everywhere it very hard to control. It will now stop responding to throttle and i noticed the ESC is very hot. Any Idea what just happened? Maybe this engine is not compatible with my ESC? It says it's for 7.2 volts which I am using. I have no clue.....

hahaha I'm a big idiot...turns out my damn battery was dead. I bought a new charger and a motor...well the charger said it was charged when i first plugged it on but I had the wrong setting so when i put it in it had power but i wasnt used to the added power needless to say my old crappy motor had the same power as this one did with a dead battery! I've never seen a car act like this when the battery is going dead though...strange...

[BrianG]

Glad you got it worked out, because I for one had no idea what you were talking about. :)