I have a 99 1.8t,acceleration is very very sluggish when I step on the gas. goes away once I hit 3-3500k rpms. new coil packs,turbo,plugs and no leaks. any ideas of what could be causing it?

 

think thats normal with the turbos, at least ive read it that way 3k+ is where u pick up your power

 

It seems like you're describing turbo lag. Keep in mind, the car weighs in at around 3200-3300 lbs. Stock, you car makes (I believe) 150hp at the crank. Max. Before that turbo spools it isn't making a whole lot of power.