High idle until vehicle stops - REALLY STRANGE!

[quk@sievers.com (Phil Payne)]

In message <A1698649C6F9CF119C6700A0249D11ED0A14B3@ntserver.spc.se> Hans Nilsson writes:

> Sometimes when i drive for a while and release gas
> and press down the clutch, my engine idles about 2500 rpm.
> This goes on until my car completly stops.
> It doesnt matter if i break to and stop or just freewheel
> until the vehicle stops, in the moment that it stops on
> the road, the idle goes down to about 800 rpm.
> THIS MAKES ME CRAZY ?!?

My MB-engined ur-quattro has done the same thing since I basically stripped, 
cleaned, partly replaced and rebuilt the whole of the engine management 
system.  The idle controller (J142, on the ur-quattro) receives a road speed 
signal via Pin 7.  I can only assume that the idle is held high while the 
vehicle is moving to provide more power steering assistance.

(Actually, mine drops in two steps - once to 1100 rpm, and after about half a 
second to 800.)


--
 Phil Payne
 phil@sievers.com
 Committee Member, UK Audi [ur-]quattro Owners Club