Again, when it rains it pours!!...now bad throttle switch?

[L DC]

Thank you all for your replies.

For Chris, YES, the VW QSW is equipped with a 3-wire
oxygen sensor. The VW QSW is essentially an Audi 4KQ
boasting the 5 can, 2.2L, JT engine and tranny.

As Huw pointed out, last night once I got home, I
disconnected the plug on the WOT switch and it ran
fine. It, however, seemed to idle just a tad better
with the WOT switch pugged in and zip-tied.

So, Huw, is the throttle switch the culprit or oxy
sensor or idle switch (same as idle stabilization
valve, no?) for that matter?

Anyway, any adverse effects by driving the car with
the throttle switch zip-tied or unplug?

Thanks again,


-Louis


--- Huw Powell <audi at humanspeakers.com> wrote:

> > Today, I was cruising along the expressway under
> heavy
> > rain and all of the sudden, the '85 QSW starts to
> slow
> > down quite a bit even with my foot on the gas
> pedal.
> 
> > Went back to the engine bay and this time I played
> > with the throttle switch by clicking the switch as
> > when on full throttle and then manually revved
> engine
> > and it worked fine.
> 
> > So bad throttle switch?
> 
> Maybe.  If the *idle* switch is bad/closed the ECU
> won't allow revs over 
> about 1400.  btdt, unplugged the switch connector,
> drove home fine, 
> bought new switch assembly...
> 
> > What's its function?
> 
> The idle switch tells the ECU to run the engine at
> idle with the ISV etc.
> 
> The WOT switch, the one you zip tied, takes the
> system out of closed 
> loop and richens the mixture for hard acceleration. 
> It seems, in your 
> case perhaps, that it might also override the idle
> switch.
> 
> -- 
> Huw Powell
> 
> http://www.humanspeakers.com/audi
> 
> http://www.humanthoughts.org/
> 



 
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