[s-cars] still looking for unstable idle problem

[Taka Mizutani]

Are these symptoms pretty universal for O2 failure?

I just test-drove a '95 Mustang GT that did the same thing- it held
idle just fine when cold but once it got warmed up, it would stall every
time the throttle was shut- coasting to a stop, waiting at a light, etc.
The A/C turned on kept it a little better, probably due to the engine giving
more gas due to the compressor load.

If it's that simple, I'll know from now on.

Taka

On 9/17/05, lebakken1 at netzero.com <lebakken1 at netzero.com> wrote:
> 
> Elijah writes:
> 
> When I start the car it runs fine until it gets warm then the idle starts 
> to go
> up and down, the warmer it gets the more drastic this becomes and it acts 
> like
> it will stall. I have change the MAFand ISV and cannot figure out what 
> could be
> causing this? Anyone have any idea's? I thought maybe a vacuum leak but it 
> seems
> like I would see that on my boost gauge and it would do it cold as well. 
> Any
> help greatly appreciated as always.
> 
> Elijah - I have seen this symptom at a friends Porsche facility. He calls 
> this symptom classic O2 Sensor failure.
> HTH
> Craig Lebakken
> 94 S4
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