It has been a long time since I posted here but I know I will get some good advice. My 1990 TTZ has been sitting in my driveway for over 1 year now because the engine needs some work. It is running really rough and feels like it is running on 5 cylinders. I checked the coils and compression and all 6 cylinders are fine which leads me to believe it is one of the injectors. It also needs new shocks, mufflers, new paint, and is obviously not passing smog so it might also need a new catilytic convertor or EGR valve. It has about 180K miles but I rebuilt the engine at 120K. I haven't had too much time to work on it and I got an offer from a friend to take it for $4K. What do you guys think? Give it up for that price or invest more time and $$ and get it working again.