CK5
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What is this sensor/part called?

CK5

In my underwear
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What is this sensor/part called and how do I test it to see if it is working correctly?
Controls timing???
TbI 350

20261002_093538.jpg

20261002_093305.jpg
 
Looks like ESC module Electronic Spark Control
 
Rap on the block with a hammer and see if timing retards? I really don't know what RPM range it functions in. Rumor has it that at some point some parts stores had testers for them. The fact that these can be bypassed leads me to believe it's creating a voltage output when knock is detected. So if you can identify the output pin and find a non-destructive way to break in (extra terminal and a depin tool?), the hammer test should show an output. Sorry, never done it.
 
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