[s-cars] Tired and Frustrated

[Robert Myers]

The WOT switch is in two sections one may be a pot as you suggest and 
as would make sense.  The other side is binary - open or closed - 
depending on throttle position.  IIRC, the switch changes state at 
about 85% of WOT.  The internals have been reported many times as 
becoming corrodes and/or developing bad solder joints/cracks/etc with 
age.  There have also been numerous reports of opening the switch and 
repairing same.  Me?  I'd just replace it if it doesn't work properly.

At 06:52 PM 6/30/2006, calvinlc at earthlink.net wrote:
>Have any of you with this condition checked your fuel pressure under the WOT
>condition?  This would be one place I would think about next....the FPR may
>be going south.  I like someone's previous thought about the WOT switch
>indication...I thought this was just a POT like most other modern cars but I
>could be wrong.  If it is a POT that is used to indicate throttle position
>then it could be opening up on one of the legs at the extreme end of travel
>indicating basically the same thing as a closed position on the throttle to
>the ECU.  I guess that's my only 2 guesses for now.
>--Calvin
>
>
>-----Original Message-----
>From: s-car-list-bounces at audifans.com
>[mailto:s-car-list-bounces at audifans.com]On Behalf Of brian hoeft
>Sent: Friday, June 30, 2006 3:31 PM
>To: Kevin Barnett
>Cc: quattroPreservationSociety at yahoogroups.com; Lance Russell;
>s-car-list; Jason Mawhinney
>Subject: Re: [s-cars] Tired and Frustrated
>
>
>sounds very much like my condition, though i believe mine to be more boost
>level related and not so much RPM related.
>
>i match your list of tested/replaced/fixed with the only other difference
>being my use of dahlback programming.
>
>in addition, i have also replaced my wastegate diaphragm AND im looking at a
>year as opposed to 6 months so consider yourselef lucky there.
>
>BIG_UP to mark at hess' copy center.. about an hour ago i just picked up
>(for $7.79) my freshly bound/double side printed copy of VAG-COM's printable
>manual.  out of those 75 pages, im going to be in the 'measuring block' and
>'data logging' sections quite a bit with hopes of better diagnosing whether
>im looking at a air, fuel or boost issue.
>
>if you have the cables you might benefit from doing the same.
>
>good luck to us both.
>
>equally frustrated, //brian
>
>
>On 6/30/06, Kevin Barnett <bluevr6 at yahoo.com> wrote:
> >
> > Ok, so for 6 months, I have been dealing with poor
> > running condition.
> >
> > Current behavior: At anything other than WOT, car
> > pulls fine and revs to redline with power. At WOT,
> > miss above 4000 rpm.  Also regardless of throttle
> > position, there is a stumble at 2000 rpm
> > (intermittantly).
> >
> > Replaced:
> > Spark plugs
> > plug boots
> > cps
> > bypass valve
> > (all the timing belt stuff)
> > Engine speed sensor
> > Fuel filter
> >
> > Tested with known good:
> > Stock computer
> > PSO / POS's off good running car
> > entire coil rack off good running car
> > MAF (with new one)
> > Intake air charge sensor
> > throttle position sensor
> >
> > Have fixed:
> > Several vacumn leaks
> > replaced most hose clamps with Breeze Clamps
> >
> > Car currently equipped:
> > IA Stage 3+ (chips + 3.0 bar pressure tranducer)
> > Hoppen upgraded hoses
> > Stratmosphere Bypass valve
> >
> > Checked:
> > all boost and vacumn hose clamps for tightness (both
> > cold and hot)
> > moisture trap (bone dry)
> > Boost and vacumn with mechanical guage
> > computer codes (none)
> > Fuel pressure (within spec)
> >
> > Cleaned out:
> > Throttle body
> > intercooler
> > hoses (including cross over tube)
> >
> > Turbo has little to no shaft play.
> > Fine film of oil on cold side.
> >
> > What do I need to be looking at for high RPM miss if
> > not ignition or fuel supply?
> >
> > Anybody in North Cackalacki got a Mity-Vac I can
> > borrow?
> >
> > Thanks,
> > Kevin
> >
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