Just put a new motor in a 94 mustang with tfs stage 1 cam and twisted wedge heads and street heat intake. the car starts and runs but dies won't idle without foot on gas......I know there is a idle relearn to do on these because it idled fine before motor was removed and before disconnecting battery. what are the exact proper steps to do this?? and with all these mods ,I've read about the nightmares with the sn-95's and mods..... will it be okay or will it have to be tuned via a chip?