[s-cars] Need Help Diagnosing a Stutter

[Douglas Fifield]

Igor,

I thought of that as well.  CPS was replaced about 20K ago and I have
two coming as part of the GP.  When it failed before it threw a CEL
before it went entirely.  No CEL this time.

On 6/21/06, Igor Kessel <KBATPO at comcast.net> wrote:
> Douglas Fifield wrote:
> > S-hedz,
> >
> > I have an intermittant stumble/stutter that is proving elusive to pin
> > down.  Most often, it acts and feels like a cylinder has dropped out.
> > Very similar to last summer's POS channel failure except that it does
> > not stick around long enough to raise the hood and try to isolate a
> > cylinder.  Usually only appears with a warm engine.  Seems to clear
> > itself in short order.  Sometimes I downshift to change RPM's.
> > Sometimes a quick couple of pedal presses does it.
> >
> > I have a spare POS, new in box in case it is that, but I am not yet
> > convinced.  Just put in new plugs and plug connectors to see if that
> > would fix it.  No go.  It also doesn't appear to be related to high
> > boost conditions, so I am not thinking a coil.  Could a failing fuel
> > pump exhibit these conditions?  How would you best test the health of
> > the fuel pump.
> >
> > Inquiring minds want to know.
> >
>
> CPS
>
> --
> Igor Kessel
> two turbo quattros
>


-- 
Douglas in MN
95.5 Audi S//6 Avant
73 BMW R60/5 mit Toaster Tank