How can i tell if my ecs or motor is fried?

[gizzmo79]

I did order a feiago 8xl.
I was running wit feiago 8l and 4s lipo, i think to motor freied my quark, because i ran wit it, and when i change the batterys it wouldent run, and i treied for a but and then there was commin smoke out of it.
Maybe i can send it back to quark and order a new one to my revo and use this for my brushless fg?