What sensor is this? B21FT

[DaButcher]

Hello, what sensor is this on B21FT 1982.
It is behind turbo manifoil, on the rearmost of the engine (wire sticking out in the picture): https://photos.app.goo.gl/obpuXB28ri3zS5EH6

 

[hiperfauto]

Post in thread 'Performance bits for the ‘77 B21f'

Aug 12, 2025

It the connector for the factory mono-tester used for setting the timing.

• hiperfauto

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[bobxyz]

The other sensor, the one with the cut off wire, looks like someone replaced the coolant drain valve with a temperature sensor.