I bet it is your slave cylinder. Check your clutch fluid is it dirty? If it is then your clutch fluid is mixing with the grease from your slave cylinder via seals are damaged. In any case get someone to pump your clutch while you look under at the slave. It's a pretty straight forward job to change it out...two bolts hold it on and the slave cylinder cost like $80. Get it from chrysler cuz mitsu is more expensive.
Alvin

96 RST

Star Stage I turbo kit /Starion I/C w/ 2" chrome piping / GReddy Type-S BOV / Missing Link / Custom APEXi- GReddy 2.5" exhaust / 55mm ARD TB/ Nology wires / APEXi EL mech boost gauge / Autometer A/F gauge / Southland Dual Friction clutch