high idle

[quk@isham-research.demon.co.uk (Phil Payne)]

In message <3.0.32.19971223091345.00bce8c0@mailserver3.nist.gov> vytas@email.nist.gov writes:

> The engine is
> easy to start cold, but picks to about 2500 rpm and stalls after about 1
> min. Then it is very difficult to restart. Pulled the Code - 4444.

You realise the codes are volatile on your engine?  You have to pull the code 
before switching off the ignition to try to restart the engine.   

> Checked
> the warm up regulator resistance - about 12 Ohms. Read some more Haynes and
> tend to think about fuel pressure. BTW, the whole story began after
> cleaning some connections with contact cleaner. Sorry to bother you one
> more time.

Is it stalling for richness - i.e., does the exhaust start to smell of over-
rich mixture before it dies?  Tried a start from cold with the connector pulled 
off the warm-up regulator?  How about the current flowing through the ISV?

Beware of the ISV circuit.  If you break it to put an ammeter in, the 
controller will not drive the circuit again until the ignition has been
switched off and on again.  Usual current (DC equivalent of pulsed current)
is 430ma.

-- 
 Phil Payne
 Committee Member, UK Audi [ur-]quattro Owners Club