RE: Hunting

[Jonas Karlsson <jkarlsso@metabolex.com>]

Greg, 

What kind of scirocco do you have?

I assume when you say "hunting" you mean that the idle is jumping around 
trying to find it's proper rpm.  

Well, I can't help you with diagnosing a failing O2 sensor, but here's 
another thought.

I noticed you said that the hunting recently started up again, and that 
it has been getting colder. When last did you change your injector seals 
(if ever) When old they get hard and don't seal, thus throwing off the 
airflow sensor, etc. 
When it is cold, the seals are even harder and the effect is more 
pronounced. This could be a possibility. It's worth checking, just be 
careful with the injectors, it can be a hassle to get them out, esp on a 
16V. 

HTH

Jonas 
85 Scirocco


Gregory Frenzel wrote:
>How can you tell when your O2 sensor is going?   When I first 
>bought my
>car, it was hunting something terrible, I replaced cap rotor 
>wires,
>plugs. and it still did it.   Confused and frustrated, I brought 
>it to
>Gorsche who let me know that parts from NAPA were all wrong and 
>allowing
>nasty arcs where they shouldn't have been.   They replaced them 
>and the
>hunting ceased, until about two months ago, it started again. 
>Only now,
>the hunting's intermitant-- sometimes it hunts, other times it's 
>a cool
>1000 RPM.   Does the O2 sensor behave erratically when failing?   
>I ask
>this 'cause it is getting colder.   A vacume line would be a 
>constant
>hunt, right?
>
>
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