[T3] Old Type IIIs (Exhaust Tester

[Jim Adney]

On 5 Mar 2011 at 8:30, Phil Hof wrote:

> I never saw it in VW publications, but there I read an instruction to adjust
> the little potentiometer on the ECU of '72/'73 models to adjust the CO
> level.  I don't have the manual (was it Clymer?) that gave a spec, but
> memory suggests somewhere between 1-3%.

I think some of the manuals may actually say this, but none of our 
brains have that pot. The late Type 4 and 914 brains do have it.

> Our atmosphere contains about 2% CO and the testers are calibrated to this
> value prior to test, by the way.

Normal atmospheric CO levels would never be that high. That would be 
lethal. Even CO2 is not usually that high. 

There's a big difference between CO and CO2.    ;-)

-- 
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Jim Adney, jadney at vwtype3.org
Madison, Wisconsin, USA
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