[s-cars] New faltering problem

[chris chambers]

Rob,

If warming the ca rup helped that could add to the theory of a bad OXS.

The OXS in our cars is a heated sensor, if the "heater" died then it
won't be able to read correctly until the exhaust system warms up
enough to warm up the OXS, which could cause it to run rich/lean
causing the stumble.

Let us know how it works out!
Chris



--- Robert Myers <Bob at chips-ur-s.com> wrote:

> 
> The OXS is relatively new but I'll give it a try.  This makes as much
> sense 
> as what I came up with.
> 
> BTW, letting the car idle for a minute or so before heading out did
> make a 
> difference this morning on my way out to pick up a new $44.51 OXS.
> 
> 
> At 07:21 AM 7/19/2007 -0600, Michael Wakefield wrote:
> 
> >*This message was transferred with a trial version of
> CommuniGate(tm) Pro*
> >Bob
> >The heater circuit in your oxygen sensor may have failed. If the
> >sensor has lots of miles on it, just go ahead and change it and see
> >if that doesn't fix it.
> >Mike Wakefield
> >Highlands Ranch CO
> >93S4
> >97Cabriolet
> >
> >On Jul 19, 2007, at 5:32 AM, Robert Myers wrote:
> >
> >>
> >>Hi Y'all,
> >>
> >>A new (to me anyway) problem has reared its ugly head.  So far it's
> >>not too bad but I don't want it getting any worse and it is a bit
> >>of a safety hazard as well.
> >>
> >>The patient:  95.5 urS6 w/ RS2 mods, etc.
> >>
> >>When the engine is cold-cold-cold on first start-up it fires and
> >>starts immediately and runs just fine until I start to add a little
> >>power to pull out of my driveway.  Then the engine falters and
> >>feels like it has some sort of fueling problem.  By declutching and
> >>getting on the loud pedal a bit it will pull for a bit and then
> >>falter a bit more.  This lasts only the first 200 feet or so and
> >>then all is well and the car runs absolutely great.  It definitely
> >>feels like a fuel starvation problem rather than some sort of
> >>ignition problem.
> >>
> >>This behavior, due to the location of my driveway entrance in a
> >>nearly blind curve in the road, is more than just an annoyance.  I
> >>need to be able to get moving NOW to get out of the driveway while
> >>the way is still clear.
> >>
> >>I have not tried letting the car idle for a minute or two before
> >>pulling out.  I'll do that this morning.  Perhaps a little warm-up
> >>time might help the immediate problem and provide another clue.
> >>
> >>Cold start valve?  If so, where is that mutha?  Other suggestions?
> >>
> >>Bob _______________________________________________
> >>S-CAR-List mailing list
> >>S-CAR-List at audifans.com
> >>http://www.audifans.com/mailman/listinfo/s-car-list
> >
> >
> >
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