So, opened the solenoid and gave it a good clean. Turns out it was pretty dirty. It's now completely dry, no grease anywhere inside the noid.
Tested it and it's worse now. I shoot it with no balls and it does a very low sound and almost no air comes out of the barrel or the feedneck, with balls it barely leaves the barrel, fell like 2 meters from where i was standing. Tried going 2 turns out on the back cap and the same thing happens.
Going to try another maintenance on the bolt guide and poppet.
Does anyone know how can I contact KEE that's not by phone?
Probably not toll free when I call them from Brazil.
But hey, cleaned the guide, switched the four guide orings, lubed and it seems to shoot fine now. I didn't have a chrono but the first test shot had a huge kick, it's probably more than 300 now. Just need to borrow a chrono again.