RE: Idling control - Audi 100 '89

[Aleksander Mierzwa <alex@matrix.com.pl>]

David wrote:

	>I recall a discussion some time ago on the List about the effects
on idling
	>of removing the dipstick or the oil filler cap - my Audi 100
falters if the
	>dipstick is removed when idling and stalls if the filler cap or
indeed the
	>crankshaft vent hose is removed.

It is supposed to behave like that

	>It has also just had its annual statutory
	>vehicle test and failed because the CO emissions are too high. I
suspect the
	>two may be connected. The engine seems otherwise OK.

Does your car have catalytic converter? 

If yes: either the oxygen sensor is shot, the cat is dead, the idle speed is
incorrect or there's a problem within the injection system causing it to run
in open-loop mode
If not: This is simply a matter of adjusting the idle speed and the mixture.
There's a small hole in the fuel distributor between the metering head and
the intake boot. It may be plugged with a rubber or metal plug. Through this
hole you can reach to the 3mm Allen mixture adjustment screw. I'm not sure
what idle stabilization circuit you have on the 100, so no help here.

Aleksander Mierzwa
Warsaw, Poland
mailto:alex@matrix.com.pl
87 Audi 5000CS turbo (mine)
88 Renault Medallion wagon (mom's)
91 mountain bike (just in case both cars broke at the same time :-)