Hello. My P4 has a serious problem. It flies in all directions normally, but to fly forward, it goes very slowly. Update already, I turned off the sensors and it was no use. Has anyone ever experienced this?

Maybe reset it back to factory defaults and see if that fixes the issue.

Even in sport mode?

ALABAMA Posted at 8-19 12:36
Even in sport mode?

Yes, in all modes.

I would check to be sure you controller is calibrated correctly.  

Mark The Droner Posted at 8-19 15:33
I would check to be sure you controller is calibrated correctly.

Totally agreed .... must be an incorrect stick parameter

Hello there MDEWES. I am sorry for the trouble this has caused and thank you for reaching out. Can you please try to check if the firmware of the said drone is on its latest one and as JetSam posted on post # 6 kindly please calibrate the remote controller of your DJI Phantom 4 for us to be able to isolate the said issue. Thank you.

Unfortunately I calibrated my control, but the problem continues.

I am about to log a ticket for this very issue downgrade your firmware back to 2.00.0700 and you will see all your issues disappear.

Unfortunately the only thing that solved it was to change the IMU board.