The last 2 runs on my SaberTooth have been surging power on/off? I first noticed this with the steering, so I replaced the servo. Then made this run.

http://youtu.be/6yAxsyTa0yg

Might be hard to tell, but I'm giving it full throttle, but it's barly moving along, then surges to full power. I turned down the LVC, and TRYED some different battery's, same thing below

http://youtu.be/H29XKVSQyz8

So should I try a different receiver? ESC? Motor?

The last vid looked fine. Are you talking about the noise is mid air at full throttle? Try setting up the TX/RX again maybe?

Hi Shaddow.. How doing? Was hoping some URC peeps would see this, the noise in the air is the tires trying to explode...lol I'm going to try another receiver? In the last video, the steering was cutting out, and the thorottle. Hince the big wide turns,,,,I'm steering, but it's delayed

I almost asked if that was the tires. Lol I'd try another receiver bud.

Maybe the BEC can't handle the current of the new servo?
And when you steer and give power, there is asked to much current of the BEC/ESC?
Try a sepperate BEC, I like the Castle one, and it is not that expencive either.

That was my 1st thought, I replaced the HV servo with the stock unit. With no results, I found a wire on my battery plug, that doesn't look like its soldered good. I'm going to re solder that.