Quark 80b and hacker c40 motors

[JCUEVAS]

So i bought these two setups. one for my flm rusty and one for my flm pede. bought two quark 80b controleers thinking they got to be good cause there so pricey. then i matched them with some hacker c40 motors. Well i soldered all the stuff and shrink wrapped the wires and took forever to program these things. I got some maxamps packs that are 3s 5250. Tried the pede out first with my 5000 7.4 venom lipo. the motor is a c40 5l. Its worse than my vxl setup because it stutters so much at low speed, (or do i mean cogging). once going its ok. runs for about three minutes and then shuts off. Running 76/16 gearing. Not happy with it! my Rusty stutters (coggs) like crazy! I have a c40 6t in it. with 11.1v it went no where. then the power shut down. I thought i had awsome equipment and now i will i would have got the castle esc's instead. Why am i having these cogging issues! Is it the chassis? My install? Someone help please!