Electronic Temperature Sender

[DH5481@aol.com]

According to the Bentley ignition chapter, besides the input to the guage
indication, this is called a temperature safety sender.  From an article on
Ned Ritchie's chip mod, it seems that the input to the ECU will reduce timing
with high temps.  This is the large sender with the brown 4 pin connector.
I had my old one laying around so I took it apart today (to take my mind off
fretting over this Lamda circuit hassle I'm currently arguing with).
Several notes have been posted that this sender (369L, replaced by 369C) is
unreliable. After prying back the brass edging, the plastic casing slid out.
 There is an IC inside which I expect is a differential amplifier (Opamp).  A
spring makes the connection as the  RTD (resistance temperature detector).
 This is, I suspect the problem.  It is a poor connection/design.  I now see
how tapping the sensor will cause it to work.  Of course, placing integrated
circuits next to 180-200 degree metal doesn't exactly thrill me either.

Maybe the 369C replacement is built better...

Dave Head
87 5KCSTQ