bk20120 problem, nd help

I just hooked up my bk20120 and got it programmed. All seemed fine until I ran it for about 1 minute and then the throttle started cutting out when I pulled full throttle. It is acting like it has a voltage cutoff? I am running it on 4s lipos and I tried 2 different packs and both did the same. It will let me drive it slow, but if I pull full throttle it pulses the throttle. Anyone have any idea if this has a voltage cutoff or any other idea what could be wrong?

[squeeforever]

sounds like maybe low batteries? mine does that when the batteries are dead (nimh)

[Gustav]

The BKs don't have a low voltage cut off.Are you using a LVC with those lipos?

[Sylvester]

My bl setup (10l/9920) cuts off at full throttle when the batts are dead.

[Gustav]

Could it just be cogging really badly?(you said it pulses the throttle) What motor,gearing,truck etc?

Well I reprogrammed it and it seemed to fix the problem, but now there is a new one. When I am going full throttle and then let off the gas, it hits the brakes for just a moment. It does not do this unless I am going full throttle and let the car wind up. I tried moving up my throttle trim, but no luck. I had the same problem with my MGM. Anyone else experience this?

[Gustav]

Someone else on the forum had this exact problem.Could be a radio glitch,metal on metal interference maybe,maybe metal rubbing when you lift off causing a glitch.What's the radio range before you get interference?

Edit:Check usual stuff like loose battery or reciever connections,loose crystals etc.

really good range, using spektrum. It does it even if it is right in front of me.

[Gustav]

Funnily enough,the other one did it with spektrum aswell,i think it turned out to be a metal skid rubbing an aluminium tranny case.(although i thought metal-metal interference was s'posed to be impssible with 2.4 ghz)

I think the most likely thing is a loose connection somewhere.

I think that is interesting about the metal tranny because that is what I have. What is a skid?

[Gustav]

Here's the thread http://www.rc-monster.com/forum/show...=sudden+brakes

Yeah,he thought it was the skid(center skid plate below the transmission),i wasn't totally convinced (because of the 2.4 ghz metal-metal thing) but he seemed to solve it so i guess it must have been.

Interesting, but I am not sure what a metal center diff housing has to do with causing interference? I have run other speed controls with the exact same setup and not had this problem, but I have also experienced this problem with my MGM. The MGM is known to have this problem though.

[squeeforever]

well actually, our very own coolhand has had a problem like that to. it did fine on a schulze but when he went to a bk it had horible problems. he did away with the center diff in his maxx and it cured the problem. sometimes its jus interferances or something to do with the controller.

[coolhandcountry]

What are you running cspurluck? Do you have a pic of it as well?

I actually have two.
Hyper 7
Novak HV
4s lipo

Kyosho K3
Neu Motor 1515 1Y
Just about every speed control made(all suck)
4s Lipo

I am also doing a Mayhem for one of the guys @ Horizon Hobby right now.
Sorry, no pictures.