Odd electronics behavior, delayed throttle & steering response

[WheelMan]

I've already posted this in the general questions area, but a friend told me to post in here as well, as you guys might be able to shed some light on this issue for me.

I've been running 2 different systems in 2 different vehicles, consisting of mostly the same components, but both having the same issue.

The first system is a Mamba Monster 2 with a 1717 Motor, 10 amp Castle BEC, and a Flysky GT3C radio. I have been running this system on 4S for quite some time now, with zero issues. Everything operates flawlessly. But the second I plug 6S into it, I get weird delayed responses to throttle and steering inputs. I can go back to 4S and everything is fine.

I have the same issue with another vehicle that has the exact same system configuration, the only exception being an XL2 ESC instead of the MM2. Same situation, runs flawlessly on 4S, but the second I plug 6S in, I get the delayed responses.

Any idea as to where I might be getting this issue from? Everything is soldered up very nicely (I'm a bit OCD about that), so I know I don't have any shorts anywhere (plus, I'm getting the same symptoms on two different vehicles). Both BEC's are soldered to the + and - on the ESC's and I've unhooked the red wire on both ESC's.

To explain the symptoms in more detail, I'm getting very "glitchy" steering response and delayed throttle response. If I turn the wheels left to right quickly, the servo moves very erratically, and stops momentarily in random spots and then seems to "catch up" and complete the action received by my input from the transmitter. Throttle is doing something similar. At times I will pull the trigger and let go quickly, as if to apply a small burst of power and then let off, but nothing happens until after I've already completed the input on the transmitter. I'll pull the trigger and let off quick, then a moment later, the vehicle will burst forward, as if there was a time delay between my input and the vehicles receipt of that input. Also, during longer throttle inputs, like speed runs, when I let off the throttle, there is a very noticeable delay in when I let off. The vehicle will continue under power for a second or two after I've already let off. I should add that this is very inconsistent behavior though. It does not happen all the time. Sometimes it will operate as if nothing is wrong and then all the sudden it will catch me off guard and act up again. Which can be very irritating. For example, yesterday I had one of the vehicles out on 6S, and I was experiencing situations where the system was acting as if I was holding the throttle at 100% for a few seconds straight, when all I actually did was "goose" it. This resulted in a few nasty crashes...as I'm sure we can all certainly understand, as a 1717 motor on 6S can be pretty wild!

Anyways, I'm hoping someone here can shed some light on my issue for me. Or at least point me in the right direction. I thought for sure I would find posts somewhere online from people experiencing these symptoms, but I came up short. So thanks in advance to anyone who can help!


-Travis