Cylinder Head Temperature Sensor, 0 280 130 017 Readings Options

[dlee6204]

I recently acquired a NOS temperature sensor for the one year only '73 Djet system 0 280 130 017. This sensor has been NLA for a very long time and finding a used one is very difficult. Given the rarity there isn't a lot of information on the proper resistance values of this sensor. Pbanders (https://members.rennlist.com/pbanders/DJetParts.htm) lists three data points for the resistance of this sensor but I thought I would post my findings. I also listed the values of the aftermarket sensor 0 280 130 012 available from 914Rubber.





@Superhawk996 This answers some of your concerns.

[Superhawk996]

Measured my used 017 sensor vs. New In Bag 012 Bosch sensor up to higher operating temperatures. As expected, both 017 and 012 converge to within about 10 ohms of each other at operating temperature. Remember that the 1973 only ECU setup is expecting a 270 ohm in-series resistor that would be expected in ADDITION to the 017 sensor. These measurements are of the sensor only.

Since I measured using oil up to higher temps my data set is light on temperatures below 44 degrees F. Since it's winter here in Michigan I may be able to use the weather to my advantage in the coming weeks to get some good data well below 32 F. (IMG:style_emoticons/default/dry.gif)

I measured in oil by heating on the way up and then allowing ambient cooling on the way down to get the hysteresis.

Here's my data alone 017 vs. 012 inclusive of hysteresis



And my data combined with the intial data sets from @dlee6204 to provide a second sample for a used 017 sensor and a NOS/NIB 012 Bosch sensor



Data set:


@nordfisch

[nordfisch]

Here's my data alone 017 vs. 012 inclusive of hysteresis

@Superhawk996
(IMG:style_emoticons/default/thumb3d.gif) (IMG:style_emoticons/default/grouphug.gif)
Thank you so much for your work!

I'll have the time to build a chart with the 'Celsius' values tomorrow.

......................................

I think the engine warms up so fast that the difference in the sensors doesn't matter much.
Yes, an engine will run up to four times richer at temperatures way below zero (Celsius) <the same as if the sensor cable is broken>, but the sensor will warm up in much less than one minute and the mixture will be in the normal range soon.

Best regards
Norbert