Help from experts wanted.

What makes you suspect the carb jetting?
The reason is because the previouce owner said he fiddled with the carp and changed some parts out because the car was running too lean and the ajustment screws didnt help. When i got it i noticed that the gas filter was bubbling. It was drawing in alot of air along with the gas. When i fixed the filter so no air could get in it it started running somewhat better but now running too rich (Dont remember if the boging was a thing)before i fixed it) i just kinda assume that it is getting too much gas. I ajusted the screws and now it starts up great and drives but it has that issue with throttle response. Currently it idles at about 1250rmp maybe even more (isnt that a bit high?) When i press the gas pedal a bit it loses all power and wants to shut off but if i give it some more it seems normal. This is Very noticable when driving.