89 subaru GL sedan problems!

I bought a 89 subaru GL 5speed about a month ago. Since then the car has been having problems. Such as loud slicking noise, sputtering/jerking after about 20-30mins of driving, and stalling out every once in a while for no apparent reason while driving.

any help would be most appreciated :)

Thank You.

k try getting a carb kit, it helped me like crazy, i had the same problem, jerking and studdering, it fixed it !:)

Thank you.

:)