[urq] RE : Lift Throttle Unintended Acceleration - '83 UrQ

[Martin Pajak]

Ben,

It has to be one or the other, either physical or fuel/timing issue.
Otherwise it's got a mind of it's own.

Cheers
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
 
-----Original Message-----
From: urq-bounces at audifans.com [mailto:urq-bounces at audifans.com] On Behalf
Of Ben Swann
Sent: Friday, February 17, 2006 9:50 PM
To: 'Jeff Lewis'; 'Andrée-Anne Bourgeois'; urq at audifans.com
Subject: Re: [urq] RE : Lift Throttle Unintended Acceleration - '83 UrQ

No hangups, no physical binding, No silly stuff like cruise control binding
-  this thing is clean.

This engine has been through and sorted, and has good fuel pressure and
control pressure goes through proper range.

-----Original Message-----
From: Jeff Lewis [mailto:jplewis at ucsc.edu] 
Sent: Friday, February 17, 2006 5:46 PM
To: Andrée-Anne Bourgeois; benswann at comcast.net; urq at audifans.com
Subject: Re: [urq] RE : Lift Throttle Unintended Acceleration - '83 UrQ

Ben,

On my MC1 thottle body, the throttle plate was NOT tight 
enough, and it would sometimes "hang up" in the bore, 
causing some strange throttle situations. After adjusting, 
and cleaning the TB all was fine for 9 years of motoring.

HTH
Jeff Lewis
82 MC1 034efi urq

On Fri, 17 Feb 2006 16:25:15 -0500
  Andrée-Anne Bourgeois <laraa at sympatico.ca> wrote:
> How about the cruise control rod sticking in its grommet 
>? Or even the
> cruise control itself ?
> 
> LAR
> 
> -----Message d'origine-----
> De : urq-bounces at audifans.com 
>[mailto:urq-bounces at audifans.com] De la part
> de Ben Swann
> Envoyé : 17 février, 2006 13:05
> À : urq at audifans.com
> Cc : benswann at comcast.net
> Objet : [urq] Lift Throttle Unintended Acceleration - 
>'83 UrQ
> 
> 
> OK - Being a little sarcastic here, and I don't mean to 
>unbury two sets of
> old phenomenon, yet I have an interesting feature my car 
>presents that I
> suppose could be described by the Subject line: Lift 
>Throttle Unintended
> Acceleration with my '83 Ur Quattro.
> 
> 
> 
> 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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