CIS cold start/idling problem

[Huw Powell]

> I have a problem with an old Audi with CIS system. It will run and idle just 
> fine when warm, but when cold, it is kinda hard to start and won't stay 
> idling if I don't keep my foot on the gas.

> I suspect the control pressure 
> regulator (warm-up-regulator) is bad, any comments on this before I go to 
> the junkyard and get one?

Problems like yours with CIS with warm up regulator systems are very 
commonly due to that device.  In the absence of fuels pressure test 
gauges, a cheap used part would be a good next choice.  Clean the 
screens before installing.

It doesn't even have to be one from an Audi, I ran a Volvo one for years 
with vacuum ports that pointed the wrong way.  Same functionality.

-- 
Huw Powell

http://www.humanspeakers.com/audi

http://www.humanthoughts.org/