Idle went haywire last night, possibly the o2?

[Huw Powell]

That could be a bad idle switch (or its wiring).  If the ECU doesn't 
know your foot is off the throttle it won't try to regulate the RPMS and 
they will usually cycle with the OXS.

The switch is on the bottom of the throttle body, IIRC, and shares a 
connector and harness with the WOT sw. on top of the TB.

On 12/3/2010 12:37 PM, Johnny B wrote:
>
> So getting off the highway in my 84 4000q, I realize my idle is no longer stable, and is now varying between 800rpm and 1200 rpm (Up then down then up then down then up then down etc etc).. I also noticed a strong odor of fuel at idle that wasnt there before.. Im assuming my o2 bit the dust but wasnt sure if it'd give the idle adjustments on the JT like a dead o2 does on newer cars. insight appreciated!
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-- 
Huw Powell

http://www.humanspeakers.com/audi

http://www.humanthoughts.org/