Ok so I am overheating still. have replaced the relay, the coolant temp swith in the block, the cooling fan switch at the rear of the engine bay and have even tried another ecm after my local garage guy said that the ecm thougt the fan was always on even when it wasn't and that I should get a new ecm. Well I got one out of a wrecked firebird and changed the proms and it does the same thing as my original ecm. What gives I cannot understand this. The ecm thinks the fan is always on but the fan never comes on....HELP PLEASE HELP!



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1988 IROC-Z T-Top "MATTSTOY"
350 Crate engine
370ft. lb Torque STOCK
5speed Centerforce clutch, Spohn Sub-frames, Jamex 1.5 Lowering springs, 2 1/2' Exhaust,ram air setup

 

(Replied on Tech/General Engine forum post)

 

Is the fan motor bad?
Check to see if the black wire to the sending unit is grounded W/a test light.
Hope this will help.