2 sensors in head 1973 FJ40

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Jul 22, 2021
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Hi Im installing a Holley Sniper 2300 and I noticed I have 2 sensors in my head
One has a black wire and the other has a yellow with green tracer.
Does anyone know what both are for?
Thanks
Randy
 
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Location
Wausau WI
Not sure on the 73, but my 76 had two temp sensors - one for the dash, and one for emissions. I desmogged with the Sniper, so the Sniper coolant sensor went in the old emissions slot, albeit with an adapter.
 

ToyotaMatt

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Hi Im installing a Holley Sniper 2300 and I noticed I have 2 sensors in my head
One has a black wire and the other has a yellow with green tracer.
Does anyone know what both are for?
Thanks
Randy


i have BOTH the guage sender and the THERMO Sender NOS , and new connectors come with them too


PM me for more 411

thanks
 

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