Originally Posted by
Civic2Scooby
hmm why did I think it was the other way around.
If you vent to atmosphere then the MAF would read less air and subsequently reduce fuel injected. It wouldn't still inject a a certain fuel amount when reading a low MAF reading.
the air isnt measured again after the maf so once its vented there is no back up to re read teh air to determine the correct amount of fuel again