<911> Bosch Motronic -Forward -Reply

Brad Anesi BANESI at novell.com
Tue Feb 20 20:42:29 GMT 1996


In a recent post, I had gotten a response back about the temperature
sensors NOT being linear.  Listed below is the response I had to this post
from my friendly (and quite knowledagble) Alfa mechanic.

Serve ...volley  ...volley  ...???

>Brad, the temperature sensors Bosch uses are thermistors and in all
>the testing I've done with them, it sure as hell looks like they're linear. 
>And even if they are not, adding a fixed resistor of whatever value
>simply starts the base at a little higher value and goes on from there. 
>The object is to have the ECU understand that the engine temperature is
>a little colder than the sensor says it is so it will be rich enough to start
>easily and run smoothly if that proves to be the problem.  The use of a
>TrimPot tells the story.  

>I can be wrong, others can be wrong.  Please let me know what you
>find.

Further opinions anyone?

Brad 
'86 Porsche 911 Coupe
'91 Alfa Romeo 164





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