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How to test the MAFs yourself and How MAFs work How to test the MAFs yourself and How MAFs work
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Old 30th October 2010, 22:22   #431
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hey guys i need some help i had a MAF problem i was running my car on only 1 MAf LEFT side i then followed the cleaning instructions on the MAF on the right side when i plug it in and run the car the car had power i never felt .... after about 100km the engine started stalling again i had to unplug the MAF on the right side and the car ran ok again i then got a new MAF and fitted it the car was running great but the same thing hapend after 100km the car have a hard time idle and switch off till i remove the plug on the MAF and start again then i can drive can some please give me some advice
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Old 14th January 2011, 22:45   #432
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I have searched but not found what I belive was posted here somewere, tha datasheet of the MAFs. I want to know massflow vs voltage.
Is there some place I can find this information?
I have measured mine and the results are some what disturbing.

If anyone is interested I can post the numbers here.
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Old 16th January 2011, 05:11   #433
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I really hope that someone here have this technical information. Please, modrators, If I am totally in the wrong place, -let me know.

It would feel wrong to start yet an other thread about AFMs

Is there anyone out there who has meassured their AFMs?
I have the equipment to test the AFMs with extremely high resolution, and I was hoping to find something to compare with.
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Old 17th January 2011, 15:49   #434
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David, I wanna congratulate you on the longest surviving thread ever! LOL
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Old 5th March 2011, 13:17   #435
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No one seems to be interested, but here are my results of 4 different airflow meters:



It would be interesting to meassure a new AFM or compare this with the specs from BOSCH.
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Old 5th March 2011, 17:11   #436
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I have the Android Torque app and the MAF readings are in g/s. Can someone shed some light on the correlation between the L/H and g/s?
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Old 5th March 2011, 19:22   #437
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The air density varies so it is really not that interesting with the volume, the engine is interested in the mass of the air.
AFMs are specified with voltage over massflow. Converting g/s to the more common kg/s is easy.

Here are some links from a great site that explains some of it:
Air - Temperature, Pressure and Density
Flow Units Converter
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Old 6th March 2011, 06:31   #438
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Quote:
Originally Posted by Galant turbo View Post
The air density varies so it is really not that interesting with the volume, the engine is interested in the mass of the air.
AFMs are specified with voltage over massflow. Converting g/s to the more common kg/s is easy.

Here are some links from a great site that explains some of it:
Air - Temperature, Pressure and Density
Flow Units Converter
I am reading 4.4 g/s on my phone and I am also reading 1.1 L/H on the cluster - doesn't make sense to me.
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Old 6th March 2011, 06:58   #439
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Great job! Thanks.
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Old 12th June 2011, 09:54   #440
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HI all:
I did a maf test today in 2nd gear..temp 40c...barometer 1015..humidity 20% ..i got 135 l/h..how is that..Am i ok with my mafs?

Thank you
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