Ok, here's the deal, my car has littleto no power below 3800 rpm. At 3800 though, it's like someone whacked the throttle open. Could it be that the primary injectors are dirty/bad? I'm trying to sell the beast and am concerned that this will me a major hassle.

 

maybe its that vacuum leak in your sig... that would be a good place to start. or you could swap the primaries and secondaries and see what that does

 

It's not the vacume leak, I've already checked that many times, and actually it doesnt exist. Maybe I should take that outta my sig.