Car shakes in short bursts when gas pedal is all the way down

Ok I dont know whats goign on, dont really know how to explain it either but I'll give it a go. recently i notcied that when I decide to step on it, the car would shake really quickly then go smoothly for a second then shake again some more smooth shake ect.....does this until i ease off of the gas pedal. It dosent matter what speed im going as long as the gas pedal goes down all the way it would do this, I did happen to notice thouigh that the shakes usally kick in right when the turbo guage passes the last line on the guage. Also When i was checking out the engine i notcied that it seeems to be leaking oil, i think, cuz the pipes running from the bottom left of the engine are covered in black oil, though i havent noticed any oil spots on the street anywhere? Would this have something to do with it? Think I have a turbo problem? engine problem? Im supposed to be taking my car into the shop today to have them install a new clutch master and slave cylinder so I'll mention it and see what they have to say, but have any of you guys encountered my problem? Thx!

id have them check the belts and pullies, could be your balance shaft is getting bad...........