Re: Check Engine Light Hell.....

["mike jones" <depolom68@hotmail.com>]

Bingo, you got it. I've been checking the resistance on the sensor it 
have been getting good readings. I also briefly looked at the solder 
joints and they were good. Then it occurred to me that I shouldn't be 
able to get a good resistance reading unless the circuit was open. I 
peeled back the rubber tubbing down to where the wires enter the metal 
connector. From outside they appeared to be perfect, but they were 
totally disinctegrated!!!!  Thanks for the help


Mike


>Mike>>
>
>	Since I haven't seen the car, I am making assumptions.  I have an '87 
TQ that
>did the same thing.  There is an air temp sensor in the intercooler.  
It
>checks the incoming air temp and retards timing if the air gets too 
hot.  If
>it is not putting out a signal, the ecu ASSUMES the air is too hot and 
goes to
>max retard for the engine.  That, in turn, lights the "check engine" 
light.
>	What I found on my car was that one of the leads to the sensor had 
been
>knocked off.  I resoldered it and the problem was solved.  (I also 
bought a
>backup temp sensor ahead of time in case the soldering damaged the one 
on the
>car.)
>	The symptoms were exactly the same as you described, but that doesn't 
really
>mean much 'cause we're dealing with Audis.  Audis are very capable of
>producing similar symptoms from several very different causes.
>	But, it's a guess.
>
>	Later.
>	--ml
>
>


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