Funky Idle

[pbureau@attbi.com (pbureau@attbi.com)]

last time my 895 8v did this it was the enrichement 
switch atop the throttle body that was faulty, replace 
it and it shoudl go away. seem it shorts out and falsly 
tells the engine to enrich the mix (at idle making the 
car stall)...
--
====
ATS - Patrick Bureau
1985 8v Euro GTX 3A/JH Project
1988 16v Gathering Automatic Parts 
for conversion.
> A friend of mine recently picked up a 85 rocco 8v.  Since then, we've been doing 
> all the usual things the PO's never do, spark plugs, wires, vaccume hoses, oil 
> change, new grounds, engine bay cleaning, new altenator, etc...
> 
> So now we get the beast running, and I wanted to work on the idle a bit so I 
> wait for the fan to come on and go off, adjust the idle screw and get her down 
> to about 950.  Figured I'd let her sit there for a bit and after the fan has 
> come on/off about 3-4 times, the idle all the sudden startes hunting all over 
> the place.  She climbs as high as 2k, drops to 1k a few times and then will 
> settle at 1800.  So, heres my question, WTF is up with that.  My 16v likes to 
> idle hunt a bit right after start but then goes to about 950 and stays put.  
> This car wait till she's good and warm and then plays hell.  My thoughts are O2 
> sensor or even wrose, the ECU.  What is the general thoughts of the great and 
> knowledgable list?
> 
> William
>