I was making some adjustments today and I noticed some kind of sensor attached to the passenger side head, in between the 2 exhaust ports closest to the firewall. Problem is that nothing is attached to this sensor and I can't find any loose wires. My question is what is this sensor, I think it is the fan temperature sensor? More importantly, where would a wire lead from this sensor. Thta wire must be somewhere under there, if I knew where it started I could find the damn thing.

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92 1LE Trans Am
5.0 Liter, 5 speed
SLP Headers
Dynomax Cat-back
SLP Cold Air, Chip
SFC, Strut Tower Brace

 

i believe it is the fan switch. the wire would go into a loom and run towards your fan.

 

If it screws into the block itself then it is the knock sensor.