[V8] RPM sensor (was Mass Air Flow Sensor)

[Ingo Rautenberg]

Jeff,

Not to dissuade people from replacing failing sensors (always a good idea
when the sensor is 12-17 years old (yep, 17 years for  a lot of 1990 V8's
manufactured in '89), but I have often found that a good sensor can mimic a
bad one when the electrical connection is dirty or otherwise compromised.

Still, keep an eye out for any other not-so-funny engine behavior.

Ingo

----- Original Message ----- 
From: "Jeff Goldberg" <jgoldberg at ntelos.net>
To: "@V8 list" <v8 at audifans.com>
Sent: Saturday, March 04, 2006 2:58 PM
Subject: [V8] RPM sensor (was Mass Air Flow Sensor)


> Swapping the RPM sensor with Reference Sensor solved my problem! The
> sensors were a little dirty on the sides, but not the business end
> from a distributor oil leak.  I cleaned them up and swapped
> locations and connectors. The car is running great.
>
> I checked the flywheel as well. '91 Audi still has all its teeth:)
>
> I am a little curious as to the symptoms of a failing reference
> sensor as this should now be my problem, however the car seems to
> run fine and codes 4444.
>
> Jeff
>
> -----Original Message-----
> From: v8-bounces at audifans.com [mailto:v8-bounces at audifans.com] On
> Behalf Of dsaad at icehouse.net
> Sent: Friday, March 03, 2006 2:07 PM
> To: v8 at audifans.com
> Subject: Re: [V8] Mass Air Flow Sensor
>
> Are you having (or did you have) any starter problems?
> If the 2111 code is real, your choices are the sensor, the wiring,
> or the
> flywheel ring gear teeth.
>
> Hopefully it is just the sensor going bad, but code 2111 that gets
> worse with
> RPM is not a good sign. Temperature just complicates this, but as
> others have
> said, you might try swapping the two ignition sensors to debug.
>
> Dave
>
> Quoting Jeff Goldberg <jgoldberg at ntelos.net>:
>
> > I've been told that the voltages are OK and that the important
> fact
> > is that they are responding to throttle.  My problem occurs at 75c
> > and the car runs so bad it can't be driven.  It misses, won't rev,
> > backfires and generally won't run.  I've tried running with ECT
> and
> > OXS unplugged with the same symptoms.  I have one code that
> reoccurs
> > 2111 - RPM sensor.  I cleared the codes yesterday and verified
> 4444
> > with the engine running cold.  I checked them again while driving
> as
> > soon as it started to miss and found 2111 set again.  I too would
> > like to try a known good MAF, but I believe it won't help.  It was
> > suggested to swap the RPM and reference sensor.  I'm going to do
> > that this weekend just for fun.  I am at loss for what to check
> > next.  It amazes me that the car runs so well cold and I can
> barely
> > coax it home after it warms up.
> >
> > Jeff
> >
> >
> > -----Original Message-----
> > From: v8-bounces at audifans.com [mailto:v8-bounces at audifans.com] On
> > Behalf Of John Dodd
> > Sent: Thursday, March 02, 2006 11:13 PM
> > To: v8 at audifans.com
> > Subject: [V8] Mass Air Flow Sensor
> >
> > Jeff ,my MAF shows the same voltages as yours.
> > Did you try to read the codes ?
> > I'm curious if you even get the same code as me(mixture adaptation
> > problem )
> > My car idles poorly after warming up but only when in gear. Seems
> to
> > surge also.
> > I bought a used MAF from a lister here but the problem has not
> been
> > solved. I wish I could try one that is good for sure.
> > Please let me know if you find one that works and if it cures the
> > issue.
> > I've been frustrated now for 2 months.
> > At one time there was a talk about having(like a group buy) a pool
> > of
> > sensors that can be send from person to person to help in
> > troubleshooting.
> >
> >
> > _______________________________________________
> > Audifans V8 mailing list
> > Send posts to: mailto:V8 at audifans.com
> > Manage your list connection:
> > http://www.audifans.com/mailman/listinfo/v8
> > Have an Audi V8 question?  Check the Audifans Knowledgebase!
> > http://www.audifans.com/twiki/bin/view/Audi/V8
> > Have a V8 answer? ... Please help others by adding to the KB ...
> all
> > contributions welcome!
> >
> > _______________________________________________
> > Audifans V8 mailing list
> > Send posts to: mailto:V8 at audifans.com
> > Manage your list connection:
> http://www.audifans.com/mailman/listinfo/v8
> > Have an Audi V8 question?  Check the Audifans Knowledgebase!
> > http://www.audifans.com/twiki/bin/view/Audi/V8
> > Have a V8 answer? ... Please help others by adding to the KB ...
> all
> > contributions welcome!
> >
>
>
>
> _______________________________________________
> Audifans V8 mailing list
> Send posts to: mailto:V8 at audifans.com
> Manage your list connection:
> http://www.audifans.com/mailman/listinfo/v8
> Have an Audi V8 question?  Check the Audifans Knowledgebase!
> http://www.audifans.com/twiki/bin/view/Audi/V8
> Have a V8 answer? ... Please help others by adding to the KB ... all
> contributions welcome!
>
> _______________________________________________
> Audifans V8 mailing list
> Send posts to: mailto:V8 at audifans.com
> Manage your list connection: http://www.audifans.com/mailman/listinfo/v8
> Have an Audi V8 question?  Check the Audifans Knowledgebase!
> http://www.audifans.com/twiki/bin/view/Audi/V8
> Have a V8 answer? ... Please help others by adding to the KB ... all
contributions welcome!