[s-cars] Nasty Misses when Pushing the "93 S4

[chris chambers]

Sounds like its cutting off the fuel pump because the ecu thinks it is
in an over boost situation.

Check and see if you have any codes

Check for boost leaks

Check the maf connector, a dirty connection can cause this problem. I
had this problem and remedied it by using a liberal amount of
electrical contact cleaner.

A bad MAF can cause this problem 



HTH
Chris

--- Bob DG <bobs6 at msn.com> wrote:

> Cut out.
> 
> >From: Robert Myers <robert at s-cars.org>
> >To: "Bob DG" <bobs6 at msn.com>, richard.tanimura at gmail.com,        
> >chris.holinger at gmail.com
> >CC: s-car-list at audifans.com
> >Subject: Re: [s-cars] Nasty Misses when Pushing the "93 S4
> >Date: Wed, 09 Mar 2005 18:13:02 -0500
> >
> >
> >
> >Is it a miss or a cut-out.  A miss is with one cylinder.  A cut-out
> just 
> >shuts everything off for a bit.
> >
> >At 06:08 PM 3/9/2005, Bob DG wrote:
> >
> >>So you think the nasty misses are a failing ignition coil? I am 
> >>experiencing the exact same problem, intermittent fuel or spark
> cut-off.
> >>
> >>>From: Robert Myers <robert at s-cars.org>
> >>>To: "Bob DG" <bobs6 at msn.com>, richard.tanimura at gmail.com,
> >>>chris.holinger at gmail.com
> >>>CC: s-car-list at audifans.com
> >>>Subject: Re: [s-cars] Nasty Misses when Pushing the "93 S4
> >>>Date: Wed, 09 Mar 2005 14:58:55 -0500
> >>>
> >>>
> >>>The OEM Bosch 3 bar pressure transducer is NLA.
> >>>
> >>>A 2.5/3.0 bar VMAP (http://moreboost.com) is a suitable
> replacement.
> >>>BUT...  I don't think it will solve the problem with a failing
> ignition 
> >>>coil.
> >>>
> >>>At 02:52 PM 3/9/2005, Bob DG wrote:
> >>>
> >>>>What about a replacement for the 3.0 bar sensor?
> >>>>
> >>>>>From: Richard Tanimura <richard.tanimura at gmail.com>
> >>>>>Reply-To: Richard Tanimura <richard.tanimura at gmail.com>
> >>>>>To: Chris Holinger <chris.holinger at gmail.com>
> >>>>>CC: s-car-list at audifans.com
> >>>>>Subject: Re: [s-cars] Nasty Misses when Pushing the "93 S4
> >>>>>Date: Wed, 9 Mar 2005 08:17:13 +0100
> >>>>>
> >>>>>Chris,
> >>>>>
> >>>>>Those symptoms sound familiar. Lots of us have BTDT. Could be a
> bad
> >>>>>MAP sensor. Could also be a leak in the boost tract. Leaks are
> pretty
> >>>>>common if you still have not changed your rubber hoses in a
> while.
> >>>>>
> >>>>>1. Pressure test the boost tract and listen for leaks. Check the
> >>>>>clamps for tightness.
> >>>>>
> >>>>>2. If it isn't a leak and you are certain it is the MAP sensor I
> >>>>>recommend VMAP. VMAP makes a dandy replacement to the Bosch 2,5
> bar
> >>>>>sensor.
> >>>>>
> >>>>>http://moreboost.com/
> >>>>>
> >>>>>Rich
> >>>>>
> >>>>>On Tue, 08 Mar 2005 20:47:03 -0800, Chris Holinger
> >>>>><chris.holinger at gmail.com> wrote:
> >>>>> > In Seattle, WA and was just diagnosed with a bad ECU pressure
> 
> >>>>>sensor.
> >>>>>The
> >>>>> > Beast is shutting off the fuel when I really put the spurs to
> it so 
> >>>>>it¹s
> >>>>> > bucking big time.  Or, as Bob Myers put it:
> >>>>> > ³symptoms:  starts fine.  Idles fine. Cruises at constant
> speed 
> >>>>>fine.
> >>>>>Will
> >>>>> > accelerate if not done too enthusiastically.  If you get
> heavy on 
> >>>>>the loud
> >>>>> > pedal you have a nasty miss.²
> >>>>> > Suggestions based upon the fact that I would like to upgrade
> in the 
> >>>>>near
> >>>>> > future?  Keep in mind, I just want to make it back to Chicago
> by the 
> >>>>>end of
> >>>>> > the month safely.
> >>>>> >
> >>>>> > Å’Preciate any other help/advice you can offer.
> >>>>> >
> >>>>> > Thanks,
> >>>>> > Chris
> >>>>> > --
> >>>>> > http://homepage.mac.com/cholinger/headinwest/
> >>>>> >
> >>>>> > _______________________________________________
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> >>>>> >
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