Quoting Ross Tech:
"Assuming, this test is done at or near sea-level, the peak output of the sensor in
g/s should be roughly 80% of the rated horsepower of the engine."
So, the normal 2.5L is rated @ 150 HP and 80% would need to be calculated to get a idea of what the peak output of the MAF sensor, should be.
150 X .80 = 120
horsepower X 80% = 120 grams per second maf max reading: for a 150 HP 2.5L engine.
So, you would be looking for roughly 120 g/s. with some slight variation, taking into consideration your current elevation, of where you live and the car is tested at.
Here was a troubleshooting thread, that turned into something of a marathon, we discussed maf testing but finally, found misfires, were a bad coil. (2.0L but principles are the same).
I cleaned mass air flow sensor....sai pump runs fine when I start car....I took air line off and its blowing good air. So next I tried with engine off I checked vacuum line going into combi valve and it holds a vacuum. Next I pulled air line off of pump and blew into ...combi valve was...
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