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Old 12-20-2016, 12:16 PM   #1
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Join Date: Jun 2016
Location: Bulgaria
Posts: 47
My Ride: E46 318i M43
LTFT, MAF and Cylinders - does this look right?

Hi guys.

I replaced my MAF sensor today. The reasons: it was showing fault 120 in INPA, poor RPM at idle, my cruise control was switching itself off, all there may be because of bad MAF.

So I purchased a second hand one and connected it to the car (BMW E46 318i M43 2000). Is there some coding that I need to do? After I connected the new MAF and clearing the fault codes in INPA, no more faults show up. However, I'm not sure there is a big change in the RPM in idle, the cruise control still switches itself off after some driving (a couple of hundred meters...).

Then I started INPA to see the readings.
The values:

What bothers me - the rough values, seems that they are all a total mess: Cyl 1 is too low, Cyl 3 is 0.00, 2 and 4 are too high I believe?
The other bothering value - the Mg/As/Zyl is far above the norms, as you can see in the pics.

Using another, bluetooth OBD2 scanner, I got data that the Long term fuel % trim Bank 1 is -0.8 and the MAF air flow rate is 2g/s, all in idle.

I believe these values are a mess, but can't find a proper data saying what are the 'normal' values. What should the Air Mass be in idle and what is this Mg/As/Zyl? The only results I got are in Polish forums..

Thanks dudes

Last edited by rako92; 12-20-2016 at 12:19 PM.
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cruise, e46, m43, maf

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