Quadcopter with APM, motors regulate up and down


I have build a quadcopter (Alien 560 Frame) with APM 2.6 and Firmware 3.2.

In the last week, I fly the copter with a 3S Lipo with 4000mah. The copter fly very stable and fine.

Yesterday, I have changed the Lipo to 4S with 5800mah. This weighs more.

The copter starts easy and fly stable, but the motors regulate up and down.
(The Motors and the ESCs can work with 4S).

Do I need to adjust by Hand?
Or can I use autotune?

At the moment I do not know if it’s good to fly the copter with Up and Down the motors …

technical data:
Motor: AX-2810Q (750) 388W
hobbyking.com/hobbyking/stor … duct=47089
Graupner E-Prop 12x6"

Please provide tlogs and/or dataflash logs to help troubleshoot your issue.

I made a short test flight.
Just hover.
I hope you see something in the log.


Thank you very much for your help!

Autotune solve the problem.