hello all im 17 and i just got my dads 83 300d turbo .....it ran fine for a couple of weeks then all of the sudden it began driving very slugishly out of nowhere on the way home ...i drove it a day later and i dont think it acelerated over 23-30 miles per hour.....when i turn it on and let it warm up and try to rev it it sounds really sad and tha tac dosent move much.....................................if any one can help me trouble shoot tha problem id appreciate it thanx.

c.j.