And I'll reiterate it again that this car had most likely sat and not been driven hard for awhile. Also want to reiterate that the car has five 6 heat rated spark plugs and one 5 heat rated spark plug. It's running around 14psi so I think that one 5 may be causing it. It still runs fine, idles fine even with the exhaust smoke. I think the smoke from this morning might have been something to do with the AC (Not really a bother to me).