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MAF scaling/low values.
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Topic: MAF scaling/low values. (Read 4249 times)
TomekBK2
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Posts: 13
MAF scaling/low values.
« on: January 13, 2023, 04:44:07 AM »
180km AJQ
My first maf sensor showed very low values. (HIHG LTFT).
I bought a used sensor and it is much better, but the values still seem to be low. LTFT 6% and 7,5%
In wot sensor showed max 137g/s. In my car there is an cylinder head with auq.
I've got an idea to scaling MLHFM to get more air for lower voltages.
I don't know if I understood correctly in wiki.
I have to subtract from MLHFM 200 and increase, for example, by 5%,then add it back to MLHFM 200?
I checked my air intake.
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Jacub
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Re: MAF scaling/low values.
« Reply #1 on: June 25, 2025, 06:47:29 AM »
hey everyone, iam having a hard time figuiring out my maf problem MLHFM is stock and good but iam getting super low g/s on wot, 110 to 115g/s to be exact and thats with 1 to 1.2 bar boost in 3rd all the way to 6krpm. now the thing is that i wired up a multimer to check if the maf is under reading but it goes up to 4.33v at wot which is 615.80kg/h in my MLHFM table and equals to 171.06 g/s if iam not wrong. so why is it showing 115g/s max in vcds. if anyone has any suggestions i would appreciate it since my car is running super lean from the low maf readings and power output is shit tbh.
thanks in andvance
car is a3 8l me7 032R
1.8t agu head, cold air intake and straight pipe
maf part number is 06A906461L
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TeknoFi
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Posts: 90
Re: MAF scaling/low values.
« Reply #2 on: June 27, 2025, 11:00:21 PM »
a) Check your maf signal wire (or put new wire for test). Also check earth is good. Stress test with lamp.
b) Open ecu and inspect that there is no partially fried contact just behind connector. Ive seen it snapped because short, so thats definitely one thing to check.
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