Shakeit motors not so powerful in game

I have 4 motors connected via motors shield and arduino uno. The motors work with the test functions in simhub, but then in Assetto Corsa they are kind of muted. Not so powerful. Barely noticeable. The motors work in Dirt Rally 2.0 as expected.

I also have a single bass shaker that work as it should both in Dirt Rally 2.0 and in Assetto Corsa with the simhub.

Any thought were i should start looking for the problem?