[V8] Replacing the Speed Position Sensor

[Enzeder]

I just ordered and replaced both of mine figuring that I'd hate to repeat 
the process if I only replaced one, then the other failed.  Went to my 
local Audi dealer and ordered them - about $180 each.  They arrived next day.

According to a manual I have, if they fail, the car shouldn't start (my 
problem).  It goes on to say that if the reference sender should fail while 
the car is running, the car will continue to run using a reference value 
stored in the ECU.  No mention of what happens if the engine speed sensor 
fails while driving.

Replacing both fixed my no start condition.

Later,
Arryn


At 10:33 PM 7/10/2004, Kneale Brownson wrote:
>The black one is 077 905 381, ignition timing sender.  The gray one is 077
>905 381A, engine speed sensor.  They are identical except for the color of
>the plastic on the connector and at the sensor head.  Reportedly, the black
>one is NLA.  I couldn't find one a year or so ago when I replaced mine.  So
>I installed two of the gray ones and put black electrical tape on the one
>that went to the black connector in the wiring harness.  They're such a
>PITA to get to, I figured I should change both if I was going to change one.
>
>No idea whether either fits the symptoms you describe.  One causes the
>engine to be hard to restart when hot (the one I wanted to change first)
>and the other causes the tach to drop to zero, which I guess would indicate
>a dying engine, eh?
>
>At 07:53 PM 7/10/2004 -0600, Eddie Dial wrote:
> >I cannot tell which sensor is the speed position sensor and which one is 
> the
> >crank position sensor can someone help me please.
> >
> >
> >
> >Also the reason I am replacing the sensor is because it died once when i
> >came to a stop and it dies when I go from Drive to reverse or vice 
> versa. Am
> >I replacing the right sensor?
> >
> >
> >Your help is freatly appreciated
> >
> >THANKS!
> >
> >ED