9545 Reseda Blvd. unit 2, Northridge, CA (818) 700-2818

Neotat vivac 4.2 running rough

Hello, I've been using my neotat vivac 4.2 almost daily? I love it for color packing and running larger needle groupings both for lining and shading. Lately I've been noticing some issues with saturation. It seems harder for me to saturate fully with one pass, also the motor is becoming increasingly louder and the use seems overall just rough not to mention if I try hold my foot on the pedal the bar will pull down but won't bounce back up unless the voltage is above a 7. I've taken it apart cleaned it super well and re lubed everything appropriately. I can't seem to find an issue. Thanks for any help.