[V8] 1992 Audi V8 4.2 running lean

[Ron Wainwright]

"Adaption Limit Exceeded" sounds like code 2231 Idle
speed regulation.
 You eather have Maximum, or Minimum adaption limit.
Maximum will give you a low idle speed which could be
the ISV, a bad connection or the MAF map.
 Or
Minimum will make your idle speed too high.
Again....ISV could be binding when open, MAF map
offset, additional air induced between the MAF & ISV.
 In the later case I'd think you have a leak.

 Ron

--- Dag Bøsterud <dag.boesterud at consulgranada.net>
wrote:

> I've had the transmission changed (automatic) on my
> 92 V8 4.2. Prior to this, 
> the engine had no fault-codes using VAG-Com.
> 
> After the transmission was changed, VAG-Com reports
> fault code "Adaption Limit Exceeded".
> At part throttle you can feel the car's running
> lean; a look at the spark plugs confirm this.
> At full throttle, the car is fine.
> 
> The spark plugs are new (and correct), the oxygen
> sensor are new and the fuel pressure regulator are
> new.
> I also checked the air mass meter, it doesn't appear
> to be broken. I cleaned it with carburettor cleaner.
> 
> I also tried to disconnect the oxygen sensor; the
> car then ran just fine.
> 
> Does anyone have any idea of what could be causing
> this?
> 
> /Dag Bøsterud
> 
> Norway
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