Quote:
Originally Posted by 03glgold
from what i understand there isn't one instead we have a MAP (mass air pressure sensor) and I believe it is as the air enters in past the throttle body
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A MAP sensor is a manifold absolute pressure sensor. The 3400 has both a MAP and MAF.. The 2.2 has only the MAP.. They both serve essentially the same purpose. Think of the MAP as an internal way to measure the volume of air and the MAF as an external way to measure the volume of air.
The MAF measures the rate of air flow to determine how much air your engine is intaking where as the MAP measures the pressure of the air to determine how much air your engine is intaking.
To me, a MAP is more accurate because it's closer to where the combustion happens. With a MAF, if you have an air leak just right after the MAF( such as forgetting to put the throttlebody gasket back on or an air hose leak), atleast the MAP can determine the actual air volume getting into the engine.