uptank001,

Your problem does not sound like injector problems. It is extremly rare that more than one injector would fail it once. Therefore you can isolate a bad injector by opening the flare nuts one at a time, Usually a bad injector makes a knocking noise that will go away when you loosen the flare nut.

I hope you don't have the bent rod problem that the 350SDL is famous for.

I would take off the valve cover and take a look. Maybe it just a bad hydraulic valve lifter.

P E H