The air is not getting out fast enough. Follow the air lines back to the solenoids and first clean the exhaust mufflers/filters. In fact just remove them and try a tool change. They are the little sintered bronze looking things. They should be on the back panel, the solenoids that is. Good news is that you have the cover off already.
Here is an example of one of the mufflers: https://www.mcmaster.com/#air-mufflers/=160y703