The TTS HydraSet coiled tubing Jar can be equipped with a hydraulic chamber which provides operators the ability to reset the jar hydraulically by increasing the differential pressure within the tool. Additional hydraulic chambers can be added to the assembly to adjust the differential pressure required to reset the jar for subsequent impacts. Each successive setting and firing of the HydraSet jar can be performed without ever cycling coiled tubing, therefore extending coiled tubing string life and reducing cycle costs.