Re: O2 sensor and check-engine

[ti@bazooka.amb.org (Ti Kan)]

> On  2/25/93  Mark Gooley wrote: 
> 
> >I almost always get a transient "check engine" light when I'm 
> accelerating
> >the car hard, especially when it's not warmed up yet (regardless of
> >temperature).  (It's an '88 5000 CS turbo with the Intended Acceleration
> >mods, but it did the same thing before I had the ECU fiddled.)  It used 
> to
> >annoy me but now it's just part of the Nature of Things for me...
> 
> This problem just started a few days ago with my 87 5000 cs quattro. 

This is not a problem.  The engine computer has sensors that measures
turbo boost and engine temperature.  If the engine is not fully warmed up,
and you accelerate hard, the computer will retard the ignition timing and
reduce the turbo boost to prevent the engine (and turbo) from destroying
themselves.  The "engine/lightning bolt" warning light will light up to
alert you of this condition.

> Yesterday I was stranded.
> [...]
> The car died.  After a 10 minute rest I got it running, ** but**, when I 
> let off of the gas to shift it died again.  Once I got it started I kept 
> it in 1st, one foot on the clutch the other, on the gas and my hand on the
> emergency brake.  
> [...]
> ANYIDEAS?  They suspect the "electrical system".  YIKES!  That
> sounds like $$$$$$$$$$$ to fix.   What would make an Audi not
> idle on its own and idle rough when you force it with the gas pedal?

Actually, it sounds more like a fuel system problem rather than electrical.

-Ti
--
    ///  Ti Kan                vorsprung durch technik
   ///   AMB Research Laboratories, Sunnyvale, CA. USA
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