hi, toyota RS2000 pedal sticking so machine does it's own sewing!?

Hi, have just taken the pedal apart to see if anything stuck inside it. No difference [have to admit I just put a drop of coconut oil on the bit I could see that moves, just in front of the cream box ... can't find proper machine oil] ... still sticking. All I can think is that the inner bit inside the cream box, where the actual 'piston' moves inside, may need oiling? Cheers, Cat