My 1984 300 Sd had an injectop knock. I replaced #5 injector and she ran fine for a couple hours. Now She runs like there is a real bad miss. No power at take off. Lots of smoke. Idle is extremely rough. Cracked all fuel lines at injectors. They all seem to be working. Not sure what to do next. I'm not a diesel mechanic. Nearest mercedes shop is 100 miles from me. Would appreciate any help. [email protected] or [email protected]