Kakaroto

Hi everyone, probably more than one here would get mad at me but I dont have another choice. Here I go, I have a 93 sc300 wich I allready did EGR delete new sparkplugs, sparkplug cables, new distributor O ring, valve cover gasket set, even wen I remove the throttle body I clean it and the Y pipe was cleaned allso, I was very derty. Even after al this the engine still have this pinpin soung even in low rpm's when I live the car role without steeping on the gas pedal. So please, any advise would be wonderful.