986 Forum - The Community for Porsche Boxster & Cayman Owners - View Single Post - Replaced Air Filter and now she idles badly and stalls

johnappleby · 09-15-2013, 06:56 AM

An update... no way to get a stock air filter at the weekend around here, so I cleaned the MAF and put the K&N back. She ran great for a while (better than ever) and then got bad again.

So either it is the K&N or it is the MAF which is bad. A stock filter costs $20 and a MAF costs $240, wonder which one I am going to try first :-)

I really didn't want to believe this stuff about oil coming out the K&N and into the MAF, and K&N heavily refute this and have done a lot of tests which claim that the oil residue is BS. But, my testing is clearly pointing to the K&N filter not working in some way.

K&N Mass Air Flow Sensor Test Results

Thanks as always. Update tomorrow when I have secured a stock filter, re-cleaned the MAF and test driven her.

John

09-15-2013, 06:56 AM	#9
johnappleby Registered User Join Date: Sep 2012 Location: Philadelphia, PA Posts: 33	An update... no way to get a stock air filter at the weekend around here, so I cleaned the MAF and put the K&N back. She ran great for a while (better than ever) and then got bad again. So either it is the K&N or it is the MAF which is bad. A stock filter costs $20 and a MAF costs $240, wonder which one I am going to try first :-) I really didn't want to believe this stuff about oil coming out the K&N and into the MAF, and K&N heavily refute this and have done a lot of tests which claim that the oil residue is BS. But, my testing is clearly pointing to the K&N filter not working in some way. K&N Mass Air Flow Sensor Test Results Thanks as always. Update tomorrow when I have secured a stock filter, re-cleaned the MAF and test driven her. John