01-16-2018, 03:41 AM
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#1
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Registered User
Join Date: Feb 2017
Location: North Eastern US
Posts: 646
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Ack - oiled air filter
Just discovered that sometime in my 986’s past a P.O. had installed a BMC oiled air filter 
At least it doesn’t appear to have been over oiled. Don’t have any fault codes so I’m just going to install a new Mahl before I button it back up. Why people do this is beyond me.
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Rgds, Fred
#317 550 Spyder Anniversary Edition 2004 Boxster S, 3.8L Flat Six Innovations engine, PSS9s, etc, etc . . .
The contents of my posts are for entertainment only. As confirmed by my many motor sports fails, I am not qualified to give product endorsements or mechanical advice 
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01-16-2018, 04:52 AM
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#2
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Multi-Boxer Driver
Join Date: Nov 2010
Location: Orange Park, FL
Posts: 1,422
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I'd clean the MAF while you're in there, just to make sure it's cleaaaan. 
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-Chris
2004 Porsche Boxster 2.7 (gone  )
2004 Porsche 911 C4S Cab
1991 Porsche 911 C2 Targa 3.6
2017 Subaru Outback 3.6R
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01-16-2018, 04:58 AM
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#3
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still plays with cars...
Join Date: May 2011
Location: Baden, ON, Canada
Posts: 1,088
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I did that on my 2000... cleaned the MAF even though it was behaving and not coding. Figured at 14 years old, it might be necessary.
Fargin’ bastidge failed almost immediately afterward.
If it’s not misbehaving, you might consider leaving well enough alone.
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Six speed 2000 Boxster S
Arctic Silver on Metropol Blue | LN Dual Row IMSR | Arctic Silver console, spoiler frame & bumperettes | Crios mod | Technobrace | RoboTop module & modified convertible top relay for one-touch roof operation
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01-16-2018, 05:24 AM
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#4
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Registered User
Join Date: Feb 2017
Location: North Eastern US
Posts: 646
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I’ll check the intake tract when I change the filter. If it’s not oily / dirty, I’ll leave the MAF alone.
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Rgds, Fred
#317 550 Spyder Anniversary Edition 2004 Boxster S, 3.8L Flat Six Innovations engine, PSS9s, etc, etc . . .
The contents of my posts are for entertainment only. As confirmed by my many motor sports fails, I am not qualified to give product endorsements or mechanical advice
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01-16-2018, 05:25 AM
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#5
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Registered User
Join Date: Sep 2012
Location: S. New Jersey
Posts: 1,239
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PO had installed a K&N air filter. I had one on my mustang GT so I was familiar with them. I never had any issues with either. Ran the Oiled filter in the Box for a couple of years. I did switch to regular dry filter. I was going on 2000+ mile road trip, wanted clean air filter and did not want to add another variable to the drive event. I have stayed with the dry filter since
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2002 S - old school third pedal
Seal Grey
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01-16-2018, 05:52 AM
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#6
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Registered User
Join Date: Dec 2016
Location: Clifton, NJ
Posts: 1,135
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Its not the end of the world. BMC is a quality filter.
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01-16-2018, 06:02 AM
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#7
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Registered User
Join Date: Feb 2017
Location: North Eastern US
Posts: 646
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Quote:
Originally Posted by Quadcammer
Its not the end of the world. BMC is a quality filter.
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True, they’re well known in the motorcycle world. I’m not anticipating any problem with the MAF because the filter appears to have been oiled properly (not over oiled). I’m just not a fan of these in fuel injected vehicles running in dusty environments.
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Rgds, Fred
#317 550 Spyder Anniversary Edition 2004 Boxster S, 3.8L Flat Six Innovations engine, PSS9s, etc, etc . . .
The contents of my posts are for entertainment only. As confirmed by my many motor sports fails, I am not qualified to give product endorsements or mechanical advice
Last edited by Oldcarguy; 01-16-2018 at 06:05 AM.
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01-16-2018, 10:26 PM
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#8
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Registered User
Join Date: Feb 2017
Location: CO
Posts: 989
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I’ve had two MAF’s fail after cleaning (not Pcar) so I just leave them alone now. If there are MAF related issues I would rather just replace it.
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01-17-2018, 07:11 AM
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#9
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Registered User
Join Date: Dec 2015
Location: Denver
Posts: 866
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When I purchased my Box 2 years ago, I went through and checked the air filter and discovered it was a K&N clogged with debris. I changed it to a OEM filter after a year, I cleaned the K&N re-oiled it and use it. The sound from the intake is much more pleasurable with the K&N. I never checked the MAF as I have not codes.
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5280 Cruising @High Altitude
Seal Gray & K&N Filter
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01-18-2018, 12:22 PM
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#10
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Registered User
Join Date: Apr 2012
Location: Riverside, CA
Posts: 1,665
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Quote:
Originally Posted by BoxsterSteve
I did that on my 2000... cleaned the MAF even though it was behaving and not coding. Figured at 14 years old, it might be necessary.
Fargin’ bastidge failed almost immediately afterward.
If it’s not misbehaving, you might consider leaving well enough alone.
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Yes, don't touch the MAF if its behaving, you WILL regret it if you do.
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"It broke because it wants to be Upgraded  "
2012 Porsche Performance Driving School - SanDiego region
2001 Boxster S, Top Speed muffler, (Fred's) Mini Morimotto Projectors, Tarret UDP,
Short Shifter, Touch Screen Dual Din Radio, 03 4 Bow glass Top (DD & Auto-X since May 17,2012)
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01-18-2018, 02:15 PM
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#11
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Registered User
Join Date: Feb 2017
Location: North Eastern US
Posts: 646
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Quote:
Originally Posted by jb92563
Yes, don't touch the MAF if its behaving, you WILL regret it if you do.
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Agreed, leaving the MAF alone until it codes. 
__________________
Rgds, Fred
#317 550 Spyder Anniversary Edition 2004 Boxster S, 3.8L Flat Six Innovations engine, PSS9s, etc, etc . . .
The contents of my posts are for entertainment only. As confirmed by my many motor sports fails, I am not qualified to give product endorsements or mechanical advice
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