cold start weirdness

[Huw Powell]

>>>Mine has the newer 3-pin sensor that I have been assuming was OK.
>>
>>**** 3pin?  I checked the FA for your car. The temp sender is supposed to be
>>1 wire, P/N 049 919 501. A 4 pin temp sensor is located under the first one
>>P/n 034 919 369.
> 
> 
> The 3-pin sensor is an updated version of the 4-pin sensor. This is the
> multi-function sensor that goes to the ECU and controls the temp guage,
> cold start, etc. There is another small sensor by cyl 1 that is used by
> the ECU (anyone know what for?).

The 4/3 wire sender runs the coolant temp gauge and a coupel of AC 
functions.  No interaction with engine management.

The 1 pin sender is the temp sender for the ECU.

-- 
Huw Powell

http://www.humanspeakers.com/audi

http://www.humanthoughts.org/