[DrifterProdigy85]

Actually boost leaks effect the engine alot if your running MAF still. What happens is the MAF senses the air going into the Turbo then if air leaves anywhere before the Intake Manifold your not getting as much air into the motor as the MAF originally read which creates a rich effect from more fuel being added then actually needed. I had around 3-4 small leaks in my IC setup which made my AFR run in the 10.9 area then after i fixed them i was running back up to 11.7 area where it should be. MAP sensor cars wouldnt really matter much since there based on getting the air measured at the intake manifold.