Mamba esc w4s & bec overheating..help?

[DwightSchrute]

Guys, i need some help...bad.....

I've got a mamba esc with the cc bec in my truck, and i've smoked 2 other escs this month. I'm runnning it in a Rustler vxl with a thunderpower 25c 4s 5000mah lipo and a neu 30c 4100 mah lipo with the vxl motor. I'm at a loss right now as to why it's happening.

I hooked it up just like they illustrated on the CC site except for one thing...

the bec wires that go to the esc that are supposed to be soldered to the connector that plug into the battery were soldered on each wire near the base of the esc....like this:



could this be the source of the problem?
I also eliminated the on-off switch...but i see alot of people do that.
is running the fan too much on the esc?
I bought the mamba specifically so i could run the 4s.....do i need any capacitors or anything?....

any help would be greatly appreciated.