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Re: 2-4kq's stumbling when cold
> The '84 4KQ I got from John Mallick has the same symptoms. He said Audi did
> LOTS of things to try to track it down. Think I recall all the ususal -
> injectors, cold start valve, etc. I recently changed the ISV, to no avail,
> because I had one from the parts car. Based on what it's doing I suspect the
> timing advance is not working properly. I have not had time to pull the
> distributor and look things over. I've got a spare 4K distributor that I'll
> try, plus want to look at this one closely.
> This assumption is based on how some of my older U.S. vacuum-advance cars
> acted when the advance was wrong.
Yes, that just reminded me.The vacuum advance was down on my car as well.
The unit was not holding any vacuum (probably the diaphram) and had to be replaced.
If it helps any VW vacuum advance unit will bolt straight on. I was looking for used
oned at junk yard and found a VW Fox with a good one. Surprising however was a fact
that 5 out of 6 I looked at were not working as well.
1982 Audi Coupe Turbo (475,000 km)
1982 Audi Coupe Quattro (155,000 km) Rally car
1983 Audi Ur-quattro (220,000 km)
1986 Audi 4000 S Quattro (377,000 km) with 5 bolt pattern
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