try replacing the vtec sylenoidfirst off and see if that helps your vtec...as for the oil light i dont know if integras are like this but some vehicles require a simple reset when you change the oil...if your integra is like this then just take it to a qualified shop and have them reset it no biggy there...it could also be an oil pump starting to fail...i would take it back to the dealorship and have them give it a one over again....dont get rid of it just yet or all for that matter just work with it