MAF questions

[Programmer]

Have you tried oiling the filter from the backside only ?? I think Fords'
TSB about K&N refers to the over-oiling of the K&N filters.
-----Original Message-----
From: David Cooley <n5xmt at bellsouth.net>
To: gmecm at efi332.eng.ohio-state.edu <gmecm at efi332.eng.ohio-state.edu>
Date: November 29, 1999 11:17 AM
Subject: MAF questions


>
>I have a question on MAF sensors in general.
>My 97 Explorer 5.0 is MAF, and the design of the Ford MAF is kind of off
>from what I'm used to on GM's.  It is a large bore with a sample tube in
>the middle (Actually open to the front of the maf in the top inside, flows
>straight down 90 deg. to main flow, then out the back into the flow of air
>again).  Just behind the inlet to the sample tube is the sensor elements...
>Look like light bulb filaments.  One in the air stream and one back up a
>bit so it's not in the direct flow of air.  I assume they either use a
>constant current generator and monitor voltage across the elements (one for
>reference) or constant voltage and monitor current.  The problem is, they
>are EXTREMELY sensitive to contamination...  I put in a K&N airfilter 6
>months ago, and every 1000-2000 miles, I have to clean the MAF elements to
>make it run right...  The last time, before I cleaned it, I was monitoring
>it with Alex's OBD-2 scantool...  at 5000 RPM and WOT, I was flowing about
>95 g/s air (definitely too low, thought the software for the scantool was
>wrong!).  Engine pinged like mad at anything over 1/2 throttle. (no knock
>sensor... Thanks ford!) Cleaned the MAF, and ping was gone... Airflow at
>5000 RPM and WOT was 196 g/s.  Is there any way to alleviate the
>contamination problem (short of going to a paper filter or a MAP based
EEC)?
>Thanks,
>Dave
>
>P.S.  Ford Motorsports sells K&N's, so it's not like they don't use them!
>===========================================================
>David Cooley N5XMT Internet: N5XMT at bellsouth.net
>Packet: N5XMT at KQ4LO.#INT.NC.USA.NA T.A.P.R. Member #7068
>We are Borg... Prepare to be assimilated!
>===========================================================
>