The hiss comes from the AIS passages. That's why your hear it cycleing.
The compressor kicks on and the AIS compensates with more flow and bingo!
Hissssssssssss.
Trust me folks this is normal.....
The stock setup holds this noise inside the can. Put an open element on
there and the noise escapes. The filter is after all acustically
transparent, ie. it lets sound through.
Remove the filter and air intake and start it up with just a naked throttle
body showing. You'll hear the same sound.
It takes some getting used to but after a while you will no longer notice
it. (It will still be there, but you won't notice it)
---Mike, near Houston.--- http://www.mikesdakota.com
'93 V8 4X2 MarkIII
Houston Area DML Meet Page
http://www.geocities.com/motorcity/downs/9221
----- Original Message -----
From: Ashton, Rick <RGASHTON@nettally.com>
To: <dakota-truck@buffnet.net>
Sent: Sunday, July 11, 1999 10:29 PM
Subject: Re: DML: Annoying Hiss possibly: K&N FIltercharger?
> do you think the hissing can be comeing from the air going through the air
filter
> itself?
> just a suggestion.
>
> Bob Tom wrote:
>
> > At 08:19 PM 7/9/99 EDT, you wrote:
> > >WEll just recently(after KN install) I have noticed an incredible loud
hiss,
> > >it cycles with somthing under the hood, sounds like a vacume leak, not
> > really
> > >sure, comes front back(twards cab) of engine compartment, anyone have
> > similar
> > >problems? ? ? Greg
> > >
> >
> > I like to think that the hissing is the beginning sound of P O W E R.
> >
> > Bob
> > Burlington, Ontario
> >
> > '97 CC Sport, 5.2L, 3.55, auto., 4x2, flame red
>
>
>
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