Thread: 1991 gta
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Old 02-23-2017   #6
merc3065
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Re: 1991 gta

Sounds like a few issues.
Temp sensor sender is on the driver's side head, check that there is a brass fitting and a grey single wire going to it.

Fan temp sensor sender is on the passenger side head. Check that there is a brass fitting and a white/grey wire going to it.

Once you checked those, then move onto the fan relay.
Only 1 fan will kick on at around 220F.
The 2nd fan will kick on only with the A/C on at 245F

The engines are designed to run hot for emissions purposes.
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