guys+ girls, ive got a r31 gtsx with a silver cover rb20det in it and ever since i did this conversion it has had a intermitant surging problem when cold! If i flatten it, it revs up very slowly and then boosts suddenly(goes sideways!) change into second, same thing, third, same etc. after about 3-5 minutes of driving it disapears! wtf is going on?
thanx people