From: "Robert Comer" 

Interesting, thanks.

--
Bob Comer


"Phil Payne"  wrote in
message news:4456166e$1{at}w3....
>> > b) Regular service.  Mixture adjusted every week, OXS sensor changed
> every
>> > 40,000 miles, etc.
>>
>> Mixture?  How hard is that to do on an Audi and why does it need
>> adjusting
>> so much?  Here it's all handled by computer and it would be a total pain
>> (time and cost-wise) to do anything every week.
>
> Takes about ten minutes.  Rpm meter (Draper DMM5) on the coil low tension,
> Gunson Colortune in #1 plughole, long 3mm Allen key and a flat-blade
> screwdriver.  It's part of a eneral regime of listening to the engine and
> looking round the engine bay for leaks,etc.
>
> Most computer systems set mixture and idle against tables, making no
> allowance for volumetric efficiency changes caused by wear.  When I go in
> for the mandated annual emissions tests, I often get a couple of monkey
> boys
> looking at the printout and the vehicle mileage and shaking their heads.
>
>

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