BMW M3 Forum (E90 E92) - View Single Post - Oiled air filters and MAF sensor/Idle control sensor

nusevad · 01-03-2012, 03:14 PM

So ive been using oiled air filters since my break in. Been about 20K miles now and I noticed that when i rev the car lightly in neutral (fully warmed up) the RPMs drop slowly around 1.5-1K for a second then drop to idle. I discintly remember before the RPMs would drop right to idle. My buddy said it could be due to my use of oiled air filters gunking up the MAP sensor or Idle control sensor/valve. Has anyone heard of this before?

01-03-2012, 03:14 PM	#1
nusevad O! So Sour!! 552 Rep 15,615 Posts Drives: Fast 240z / Slow M3 Join Date: Apr 2007 Location: 'Merica! iTrader: (24) Garage List 1971 Datsun 240z [0.00] 2008 M3 [9.60]	Oiled air filters and MAF sensor/Idle control sensor So ive been using oiled air filters since my break in. Been about 20K miles now and I noticed that when i rev the car lightly in neutral (fully warmed up) the RPMs drop slowly around 1.5-1K for a second then drop to idle. I discintly remember before the RPMs would drop right to idle. My buddy said it could be due to my use of oiled air filters gunking up the MAP sensor or Idle control sensor/valve. Has anyone heard of this before? __________________ Last edited by nusevad; 01-03-2012 at 03:32 PM..
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