I pressure wash it like 3 weeks ago....and it has been acting strange after.....also oil has been changed, but I dont think that has anything to to with it....
it is 2014 SB with power commander 5....
I openeed all PC5 and ecu plugs and checked if there is any water, I left them open throughthe night and used hair dryer too.....still stutters

it stutters when you use only little throttle to keep it at constant speed....so it cucks....bit time
I tightened battery terminals too....i dunno what to do next.....

 

You might want to rethink using a pressure washer. Not only bad for electronics it also forces water into bearings, wheel and neck. Also spoke nipples which rust quickly.

I only use gentle water from hose to rinse.

 

Pull the pc5 and see if it still happens.
Sounds like a lean condition. Check for intake leaks.

 

I will try to autotune it....it worked just fine now for years......
intake leaks on air filter? I have screaming eagle one....

 

You can try autotune if you want, in case the map was corrupted somehow. Removing it will eliminate the unit itself as possibly being defective.
Check for intake leaks between the intake manifold where it attaches to the head of each cylinder.

 

ok i youtubed intake manifold....but how to check for leaks? you mean fuel spraying or something?

 

Not the filter- the intake manifold.
Just look at this:

 

i see, so there might be leaks....i dont have the starter spray.....tomorrow I am trying without power commander 5 first but if the problem still persists I will have to take it to service.....

so to replace intake gaskets you need to remove the tank?

 

Who said to remove the gas tank?
Don't use starter fluid- get throttle body cleaner or mass flow sensor spray.

 

I thoguht the suggestion was to spray around intake gaskets to see if the motor changes sound so you see if there is a leak in gaskets of the manifold like the guy showed in video
mass throttle spray is for cleaning....not for detecting leaks right? so why you suggest it?