Hello People!!

recently I have noticed that my Disco knocks when im driving on an incline.
Weather its on Motorways travelling 110km or city driving.
It doesnt always do it though.... it decides when it wants to..

MAF is working, Fuel Filter and Fuel Pressure Regulators all been changed not so long ago.

The only thing I havent looked at is the injector seals..

any help will be nice!
I got a nanocom as well so I could look things up if I need to
(Im still very new to all this as you may be able to tell)

Thanks!!!