Originally Posted by mikeydrives1
Lets think about that for a second... If there was a boost leak, which would mean less pressure / less air, wouldnt that result in an overly rich condition and not too lean?
If he was recieving more air than the map could compensate for, that would be leading to a rich condition.
Just trying to understand more myself, here.
when the engine is in vaccum (idle) and there is a leak going in, there is extra air coming in that the mass air flow sensor hasnt accounted for. More air than fuel is a lean condition. now when hes under boost, the pressure post turbo is under pressure and if the leak were coming from post turbo the correction value should turn into a negative value because of a perceived rich condition. if it is before the turbo but after the maf it would still be a positive value