s4 turbo.. extend port.. im pretty sure i have a vac leak.... sprayed brake clean around manifold and it dropped idle down. wont idle at 1000 when cold,, will when warm idle at 1500 cold with me adjusting it. poor throttle response if i stab gas will go lean for a sec at stutter. just redid top manifolds so they not leaking now so im thinking its leaking where inlet goes to block?