NEED YOUR EXPERTISE with MAF sensor

LuigiBMW5412 · 12-22-2021, 10:12 PM

Hey everyone,

Just purchased a 2007 328i. It does NOT have a check engine light, but occasionally it will have a rough idle. And, fuel trims are still within parameters but show an obvious "issue".

I believe the MAF sensor is on its way out because of the reading it's giving. I already removed/cleaned it.

It's reading about 2.6 g/s at idle. I can't seem to find a concrete answer for normal ranges anywhere. Some say it should be around 5 g/s.

So, what should it be at idle?

0l0dom0l0 · 12-24-2021, 05:42 AM

If you think you are having issues with it then just unplug it to rule it out.

E92_William · 01-02-2022, 08:38 AM

In my car I have seen from 4-5.5 ish at idle. 2.6 indeed seems low. I would try and clean the sensor as maybe it is dirty and that's why it's not reading as much airflow

12-22-2021, 10:12 PM	#1
LuigiBMW5412 Registered 0 Rep 1 Posts Drives: 2007 BMW 328i Join Date: Dec 2021 Location: California iTrader: (0)	NEED YOUR EXPERTISE with MAF sensor Hey everyone, Just purchased a 2007 328i. It does NOT have a check engine light, but occasionally it will have a rough idle. And, fuel trims are still within parameters but show an obvious "issue". I believe the MAF sensor is on its way out because of the reading it's giving. I already removed/cleaned it. It's reading about 2.6 g/s at idle. I can't seem to find a concrete answer for normal ranges anywhere. Some say it should be around 5 g/s. So, what should it be at idle?
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12-24-2021, 05:42 AM	#2
0l0dom0l0 First Lieutenant 69 Rep 316 Posts Drives: BMW E92 330i Join Date: Jun 2020 Location: Uk iTrader: (0)	If you think you are having issues with it then just unplug it to rule it out.
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01-02-2022, 08:38 AM	#3
E92_William Captain 1306 Rep 852 Posts Drives: 2008 BMW 328xi Join Date: Apr 2021 Location: South Florida iTrader: (0)	In my car I have seen from 4-5.5 ish at idle. 2.6 indeed seems low. I would try and clean the sensor as maybe it is dirty and that's why it's not reading as much airflow __________________ Airplane Mechanic BMW Masochist
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