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FD Repair Kits
In message <9709158769.AA876951528@genchip.uunet.ca> "Mike Hopton" writes:
> I have a spare FD for my '83 ur-q that I would like to rebuild and use
> on my '85. The reason: in the winter I have problems starting my '85 a
> mechanic I trust believes that the plunger in the FD is sticking (when
> the temperature gets cold) does this sound plausible, runs fine as
> long as the temperature is above 0C?
I have to do some asking on the spares. I'll do it on Sunday.
It seems that the vast majority of fuel distributor problems are caused by
erosion of the upper O-ring on the barrel that contains the plunger. This
allows system and control pressure to mix at a flow rate that the control
pressure regulator can't deal with - the effect is to raise control pressure
and thus reduce fuel flow. It's very gradual, and most people just don't
notice they're getting less performance.
You should really hook up a fuel pressure gauge when the system is cold annd
watch what happens when you start it up.
Committee Member, UK Audi [ur-]quattro Owners Club