I did some engine big engine work not too long ago and now when the car sits for awhile it gets close to overheating. The fan doesnt turn on at all. But when I hit the ac button the fan kicks in and the temp goes down too. Im guessing I probably screwed up some sensor that turns the fan on. Can someone show or tell me were it would be located on the V6??

Thanks!

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'85 SE 4 Speed
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No Cat
Holley Scoup
Holley Throttle Body

The stock fan switch doesn't come on until something like 235 deg

Before it use to come on around 200 now it will get in the red if I let it I think I found a pic at: https://www.fiero.nl/forum/Forum2/HTML/049071.html

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'85 SE 4 Speed
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No Cat
Holley Scoup
Holley Throttle Body

You can get the switch you need at: http://www.fierostore.com/pegasus/index.asp

Phil

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86 GT TTops, 3.4 Auto.....bought from Doug of Fiero Warehouse

GM auto tech for 27 years. Specializing in electrical and computer problems. I will never be able to return as an auto tech again. I get EXTREME satisfaction helping others and will go to Extreme levels to help you if you need help. I have LOTS of free time on my hands. This forum and the help I give, allow me to have a purposeful life. Bring on the problems......LOL.

In Jazz's picture, it's the one that sticks straight up, nearest the thermostat. The one with the single pin, round connector.
You can test everything in that entire circuit except the sensor by unplugging the wire from the sensor, and grounding the center wire in the connector. If all the circuitry is good, the fan will come on.

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Raydar
88 3.4 coupe...........

Coming soon...
88 Formula, presently under the knife.
Read Nealz Nuze!

Here's the picture, it's the center one. On the left is the ECM temp sender and on the right is the cold start injector switch:

JazzMan

Thanks guys! Im off to go test it right now!

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'85 SE 4 Speed
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No Cat
Holley Scoup
Holley Throttle Body

bump

I'll take a look after class and let you know for sure buy my wire got lost as well. I ended up disconnecting the large vacuume hose that connects to the plenum, and moved mmy cables off of the thermostat housing, then I found it lost under the large coolant tube. You may want to check there.

Thanks! I know exactly how that goes. I had to put half the engine back together and somehow forgot to get it in. Thanks for the response Jncomutt I wanna make sure I didnt lose it somewhere!

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'85 SE 4 Speed
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No Cat
Holley Scoup
Holley Throttle Body