[s-cars] Saga continues: Miss not from bad WGFV - Could it be the MAF?

[Linus Toy]

Chad--

I earlier sent this to Ed, but neglected to cc: the list.
I too had the fast fluctuating boost gauge needle you describe (91 200q, IA
stage III+).  When I asked Ned Ritchie for ideas, he suggested looking for
boost leaks in the intake tract.  Took awhile, but after replacing most of the
rubber bits in the intake tract (don't forget the crankscase breather hose),
the flutter is gone, and my boost will more consistently go to 21-22 psig.

Testing for leaks.  See this link for ideas:
http://www.awe-tuning.com/media/pdf/27t_pressure_tester.pdf and there's another
site out there I don't recall w/ how to make a tester


--------------------------------------------------------
Linus Toy               Insanity is doing the same thing
Mercer Island, WA       you've always done and expecting
linust at mindspring.com   different results
                        - Roger Milliken, Milliken & Co
--------------------------------------------------------

> -----Original Message-----
> From: s-car-list-admin at audifans.com
> [mailto:s-car-list-admin at audifans.com] On Behalf Of CLAG500 at aol.com
> Sent: Thursday, April 10, 2003 1:13 PM
> To: edward.walsh at agedwards.com; s-car-list at audifans.com
> Subject: Re: [s-cars] Saga continues: Miss not from bad WGFV
> - Could it be the MAF?
>
>
> > The boost fluctuation is slow, but when the needle does
> move, it is a quick
> > movement.  It really looks/feels like the ECU is adding and
> taking boost.
>
> Ah. This is different from what mine does. It feels more like
> a miss under load and the needle oscellates back and fourth
> very rapidly (So fast that it looks like one wide needle).
> The needle even does this under partial boost but you can
> only feel it under 20+ psi at low rpms under load.
>
> > One thing I haven't check is the Ground Strap.... Where
> > would that be?
>
> The one I'm refering to is the one on the coil cover.
>
> Chad
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