I did a complete tune up on it. Also put Lucas oil treatment in the engine. (It's a 2.5 4 cylinder) I also just filled it up and put the piston cleaner in it and let that run threw. In nuetral I'll rev the engine sound great. I put it in gear and idles perfect but runs really ruff when trying to increase in speed. Also I smell a lot of exhaust. ( that was also replaced last month in a shop). I'm brand new to jeep world just got it a month ago. Any advice would help.
Running rough, idles fine
