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Re: [T3] Aux. air regulator trouble


On 3 Jul 2001, at 11:59, HBakr@aol.com wrote:

> In a message dated 7/3/01 8:25:41 AM Pacific Daylight Time, 
> jadney@vwtype3.org writes:
> 
> << > Even when the engine doesn't respond to movement? 
>  I don't understand what you mean here??? >>
> 
> I was referring to my previous post in which I stated that the idle
> drops way low to almost 100rpm and at that point, doesn't respond to
> throttle movement by an increase in rpm. I should add that it doesn't
> die either, it just keeps on puttering till I turn the ignition off.

I guess I really don't know what to make of this. An engine that will 
continue to run at such a low RPM is pretty unusual. Certainly I've 
never seen such a thing. It would be hard to suggest that there is 
much wrong here, but I would start by checking all the standard 
things: ignition timing & dwell, valve clearance, fuel pressure. Get 
these adjusted correctly and see if this changes anything.

When you disconnect a temp sensor you are just fooling the ECU 
into thinking the engine is cold and it responds by giving the engine 
a richer mixture. This might tend to make us think that the engine 
is running too lean (fuel pressure too low???), but that seems 
inconsistent with the low RPM that you report. 

BTW, the AAR has no effect on the richness of the fuel/air mixture.

-
Jim Adney
jadney@vwtype3.org
Madison, WI 53711-3054
USA

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