Cylinder head temperature sensor test ?
 

My 86z non turbo is running very rich to the point it's running extremely rough and a strong smell of gas from the exhaust. The ecu gives me the code for a faulty cylinder head temp sensor. I know it's a pain to change so I want to be sure it's bad before going thru the Hassle of changing it on a guess. Is there a sure fire way to test it?
Thanks

Yes. FSM has CHTS test (and test for every sensor):
XenonZ31 FSM Downloads