Well it all starts with a 2.3 tb i had in my 95-98 2.4 engine everything fine bolted right up.. swaped to engine for a 99-2001 and tryed to installed the 56 tb and no luck it like sucks in alot of air through the little port that goes to the vacum lines and the brake booster and idles high( There is no leaks). i decided to put my stocker back on... my brakes are gone !!!! well i would have to slamm the brakes all the way in and hear nothing but air. for it so like anyone else i changed master cylinder/brake booster/lines/brake pads to come out with the same result. I bleed the brakes 15 times/ got a professional to do it and no luck... but when i disconect the brake booster line from the brake booster the Brakes are FINE they are hard and brake really good... So i dont know were else to turn.. anyone have an answer for me ? thanks