Hey guys, 
I don't have this problem with the NGX but the throttle goes jumping up and down in the 777 without us inputing any throttle, etc.

I just start the engines and the throttles move up and down. 
Tried enabling Exclude throttle in FSUIPC with no luck.

Any of you have had this problem?

I am using CH Throttle for management.
Thanks in advance!

 

Teo

Try to see if you have the option enable into the CDU PMDG Option to override your throttle when A/T is on.

 

Try to press F1 to see what it is doing.