'85 4k quattro/trip computer accuracy

[William Perron]

Eric Kissell wrote:
>>I have always wondered if the relationship between
>>the airflow meter pot,
>>which gives plate position, and the 3mm adjustment
>>screw at the airflow
>>meter, which I believe adjust plunger height
>>relative to plate 
>>position,
>>could fool the car into thinking it was using
>>more/less fuel  than it
>>actually was.

This has been my experience on my 4kq.  I tried
adjusting the dip switches on the instrument cluster-
could get it closer but still too high.  Mine was
originally very high just like Mark's - reading around
28-29 mpg when actual was more like 19-20 mpg.  About
a year later I did a full tune up, replaced a bunch of
the old vacuum hoses, and adjusted the basic setting
using the DPR w/ a multimeter and the little 3mm hex. 
After that, my MPG gauge has been reading very close
to accurate, so the 3mm hex adjustment of the basic
setting does seem to impact the readings on the MPG
gauge.


-Bill Perron
'85 4kq
'95.5 S6 Avant



	
		
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