Unintended Acceleration - really happens

[Geraint Lloyd]

there's a comment in the KB about that
http://www.audifans.com/twiki/bin/view/Audi/CruiseControl-EliminateKillerRod

geraint


L DC wrote:
> I once had an incident of UA on my '87 VW Quantum
> Syncro in stop and go traffic in the highway some 3
> years ago.
>
> As I shifted into first and revved the engine to
about
> 3K RPMs and shifted again into second, the revs just
> stayed there. I immediately put it into neutral and
> stopped the vehicle followed by shutting down the
> engine right in the middle of the road (I could fo
> that since its was a stop an go traffic anyway).
>
> I popped the hood to take a peek.
>
> Culprit turned out to be the cruise control's 1/2'
or
> so metal pin that attaches to the throttle control
and
> the that small vacuum canister. The plastic bushing
> that holds the metal pin broke off as I accelerated
> and the pin's end that hooks up to the vac canister
> fell and got stuck next to the passenger side of the
> valve cover.
>
> I replaced said bushing with a metal clamp and has
> worked great ever since.
>
>
> -Regards,
>
> -Louis
>
>  
>
>  
>
>
>
> --- "John S. Lagnese" <jlagnese at massed.net> wrote:
>
>   
>> In the 80s most of the UA was found to be driver
>> error. The accelerator 
>> pedal was usually found twisted. The driver was
>> stepping on the gas thinking 
>> it was the brake.
>> I was working at a VW/Honda/Volvo dealership. The
>> Quantum was considered 
>> suspect due to the problems with the Audi.
>> I had a bit of UA in my 92 Jetta. It turned out
that
>> the accelerator linkage 
>> needed a clean and lube. The older cars can
>> definitely find unique ways to 
>> have UA.
>> John
>> ----- Original Message ----- 
>> From: "Jim Jordan" <j8k3sp00n at gmail.com>
>> To: <quattro at audifans.com>
>> Sent: Monday, August 07, 2006 4:01 PM
>> Subject: Unintended Acceleration - really happens
>>
>>
>>     
>>> Hi,
>>>
>>> I was the driver during unintended acceleration of
>>>       
>> my 5KT with over 
>>     
>>> 334,000
>>> miles on it this morning.  I mocked and scoffed at
>>>       
>> claims of it until now.
>>     
>>> It happened after I drove about 5 miles on a
>>>       
>> freeway at moderate speeds,
>>     
>>> turned onto an 8 lane boulevard, Laguna Blvd in
>>>       
>> Elk Grove, got off at the
>>     
>>> wrong place, did a U turn, got back on the
>>>       
>> boulevard, and the UA started.
>>     
>>> Traffic was light fortunately, I was able to break
>>>       
>> enough to make a right
>>     
>>> turn at the the next light, then into a large
>>>       
>> parking lot which was mostly
>>     
>>> empty.  I drove to an isolated spot, pulled into a
>>>       
>> parking place, popped 
>>     
>>> the
>>> gear shift out of "D" into "P" almost
>>>       
>> simultaneously turning off the
>>     
>>> ignition.  The revs built like crazy in the split
>>>       
>> second between getting
>>     
>>> into "P" and ignition off.  It was marginal if the
>>>       
>> brakes would have
>>     
>>> completely stopped it if I really had to come to a
>>>       
>> full stop.
>>     
>>> It was unnerving to say the least.  I immediately
>>>       
>> opened the hood/bonnet,
>>     
>>> checked the throttle rod, throttle position,
>>>       
>> cruise control rod, and 
>>     
>>> tranny
>>> to throttle rods.  All were in their normal
>>>       
>> stopped positions.  I had not
>>     
>>> used the cruise control at all this morning.
>>>
>>> The most probable cause is that I used Gunk engine
>>>       
>> cleaner on the engine
>>     
>>> yesterday and sprayed it off;  maybe I didn't dry
>>>       
>> it out completely and a
>>     
>>> linkage bound up temporarily.
>>>
>>> After the incident, I did my errands without
>>>       
>> further problems.  However, I
>>     
>>> can see how an inexperienced or panicky driver
>>>       
>> might have had a problem 
>>     
>>> with
>>> the UA.  I can conjure up images in my mind of
>>>       
>> someone going about 100 mph
>>     
>>> down Laguna Blvd, dodging in and out of traffic. 
>>>       
>> Couldn't wait for the 
>>     
>>> gas
>>> to run out;  the tank was just filled. 
>>>       
>> Yahooooooooo!
>>     
>>> So there, now I've had my UA incident.
>>>
>>> Cheers!
>>>
>>> Jim Jordan
>>>
>>>
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>>     
>
>
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