rud0215

whats up guys im having a sputtering problem with my car and i am stomped on what it could be , the car breaks up or sputters as soon as i get into vtec or sometimes it will start a little sooner or a little later. but its always at a rpm higher then 4000. i have a b20vtec bored over ,it used to be on boost but i sold the setup, im back on stock injectors a b20vtec basemap and i have a walbro fuel pump. i changed my dizzy and nothing, im either thinking i have a clogged fpr or my fuel pump is going out. oh and my car runs alot better when i have the vacume from the fpr off. any suggestions?