Diagnosis steps & tools?

[thergen at svn.net]

I replaced the O2 sensor in my case. 

To clean the IAC, I used some carb cleaner and a soft cloth to remove the
carbon from the head of the pintle and the area on which it seats.  See
Bruce's post on how fragile they are.  I recommend against turning the key
to the on position with the IAC still wired up but not bolted into the
throttle body (unless you know what/why you're doing it).

Tom

On Mon, 8 Feb 1999, Terrill Yuhas wrote:

> 
> 
> On Mon, 8 Feb 1999 thergen at svn.net wrote:
> 
> > I had a similiar problem -- hunting/unstable idle only when warmed up on
> > an '87 2.8 Cavalier (MAF).  It turned out to be the O2 sensor. Clean the
> > IAC passage and pintle also.
> 
> Are O2 sensors cleanable or did I read that wrong?  Is there a manual that
> documents cleaning the IAC or is it sufficient just to unbolt it and spray
> it out with cleaner?  The car-specific manuals (Haynes & Chiltons) I have
> show how to remove the IAC but not how to dismantle it.
> 
> Terrill
>