Motor bucks slightly (long)

Peter Schulz pcschulz at
Thu Nov 12 13:38:11 PST 2009

You forget that for the most part the 3b ECU has limited diagnostics,  
and you often need a hard failure to get a code.

Even with VAG COM monitoring channel 000, you would likely not know  
what's good or bad...

On Nov 12, 2009, at 2:49 PM, Brett Dikeman wrote:

> On Wed, Nov 11, 2009 at 6:07 PM, robert weinberg
> <centaurus3200 at> wrote:
>> doubt it's the computer. seriously, change all those $18-$35  
>> sensors, one of them is at fault. the ones that are okay are still  
>> 18 years old and could crap out at any point. you can change most  
>> of them yourself. they are staring right at you when you open the  
>> hood.
>> i've noticed the audi ECU is not real good at throwing codes. maybe  
>> it has too much pride? LOL!
> There is no point in changing "all those $18-35 sensors" when the ECU
> has self-diagnostics.  Plug in a VAG-COM-like tool and you can see
> exactly what values the ECU is seeing for most of the sensors.
> Once in a blue moon I had problems with slow starting/rough starts,
> and once in a blue moon I had problems with weird throttle behavior;
> the symptom I found was that engine braking was odd right near the
> throttle rest; it was greater than if I just took my foot off the gas
> completely, which was very odd.  Both were rare, and so I never
> bothered looking into them.  I seem to recall the throttle stuff only
> happened when it was below freezing (I know for sure it happened once
> when it was -25 degrees F.)
> Brett
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