Air leaking back into paint cup
I have a Fengda FE-130. I’m not sure what I’ve done, but right now air keeps leaking back into the cup, like when you cover the front with you finger to force air back to mix the paint. Paint and air still flow through (although a bit splotchy), but the cup keep boiling rather aggressively. I’ve tried cleaning the whole thing and adjusting the needle position back and forth. Any suggestions?