I just installed a 302 h.o. motor in a 93 mustang. I am running a mass air system. Stock motor, cam, heads and pressure reg. the motor and intake came out of a running car that really didn't run rich at all. The car at idle blows out black exhaust and when you hit the gas it looks like a black smoke screen. I bypassed the egr and removed the smog system. PLEASE HELP. Any suggestions would be great.