Hi I bought a 1992 Sc400 a few months ago and i got all the maintenance that was needed done on it like a tune up, oil change, etc.. recently i just ran into some problems, i was too lazy and i let my car run out of gas... well ever since then my cylinders are not all working.. so i thought maybe it was the injectors so i bought some B-12 for that, then that wasnt the problem so i got a new fuel filter and its still running like it lost power.. pls help me if you feel you know what the problem is before i take it to the shop and get ripped off. Thanks so much for listening.. :( Help Please