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Old 11-12-2011, 09:04 AM   #3
ramairbrc
Registered User
 
Join Date: Nov 2009
Location: Newport, NC
Posts: 29
My Ride: 2001 330cic
Thank you for the response. I did take the intake area apart yesterday and looked for potential vacuum leaks. Though the boot itself looked intack (I read that many have cracked), I noticed that the small vacuum line on the "t" was in bad shape, so I replaced it.

The car does have almost 130K miles and an AFE Magnum Force intake with an oiled filter, which is why I wanted to know how to check if the MAF sensor was bad. The filter was horribly dirty, so I followed the instructions and cleaned it, and then slightly oiled it (not my first such filter). I bought some MAF sensor cleaner, and did that while I had it all apart.

I did notice that the MAF sensor readings appeared to be "over time" with the M for minute and the S for second.

So, we'll see if that helped prevent the P0171 and P0174 codes.
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