[urq] Lift Throttle Unintended Acceleration - '83 UrQ

[martin at quattro.ca]

Yeah, BTDT.  Used to happen in my MC powered Ur-q.
This has to do with the fuel mixture, as you reduce throttle and disangage
full throttle switch, the fuel mixture is leaned out (but still
registering rich by O2) and that will actually make you more power.
Check out your basic fuel mixture and fuel pressures.  Looks like at Full
throttle you are running too rich.  Oh yeah, also check your
turbo-intercooler and intercooler-throttle hoses.  A boost leak will also
cause this.
Your car should have more power at WOT than at part throttle.

Hope this helps.
Martin Pajak

http://www.quattro.ca

1982 Audi Ur-quattro (50,000 mi) new project
1983 Audi Ur-quattro (85,000 mi) Concourse d'Elegance
1985 Audi Ur-quattro (212,000 km) Euro spec. import mit 3B :)
1987 Audi 4000s quattro (205,000 km) wintervagen mit 7A :)
1990 Audi V8 quattro (365,000 km) pipe and slippers



>
> Basically, I'll be accelerating nearly Wide Open Throttle - no problem
> there.  However, have noticed that when I begin to lift my foot off the go
> pedal, either to reduce acceleration, or to slow down, there is a
> momentary
> acceleration surge.  So I'm wondering what the cause may be.  It seems
> that
> there may be more power to be had, since the car briefly seems more
> powerful
> when letting off the throttle, as it accelerates briefly then it
> decelerates
> normally.  It also is a little unnerving when you go to slow down and the
> car speeds up.
>
>
>
> Ben
>
> benswann at comcast.net
>
>
>
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