I am haveing a problem with my 94 civic. the motor blew (d16z6)so i put a new motor and tranns in it. The new motor is a jdm d15b vtec i got a new tanny . The motor came with differant intake manifold so i put a skunk2 intake manifold ,throttle body, aem intake on it. All those parts were for a d16z6. i went to start it and it revs up and down . When i press the gas it bougs down. i can not find a vaccum leak.help me if you can