hey there,I finally got around to joining because im having some issues that i cant find answers to, im hoping to get some help.
i have a 98 a4 1.8tq with 115,000 on the clock. all stock exept for a cone filter and lowering springs. heres the list of the problems:

1. just in the past few days the car is reluctant to fall to a steady idle. it falls down to about 6-700rpm, rumbles for a second, the gets back up to where it should be and will hold just fine. it happens any time i let off the gas, even if i just blip the trottle a little bit.

2. when the car is cold ( seems to be the only time it does it) i get really pulsating, choppy boost while under about 3000rpms then smooths out. I just put in a new 007 dv. from what i have read it seems to be the n75?

3. when turning at low speeds(parking lots) and i press on the brakes, the abs engages. abs sensor?

4. i cant seem to fix the front end sway that i have going on. i have replaced all the control arms and have checked every nut and bolt on the front end multiple times. when im going down the freeway its almost like i can feel the whole front end move from side to side, like the tires just follow any grooves in the road which makes me have to constantly correct. also the steering wheel does not go back to center on its own, it gets within about a eighth of a turn and then i have to center it the rest of the way. normal? do the subframe bushings ever go out? or the rack and pinion bushings? i cant think of anything else it would be...

anyway, thanks for reading and let me know if anyone has some possible answers.