Accidently pulled the wire off the temp sensor now i cant remember where the temp sensor is located..

305 TPI V8

Gunna kill the car this summer without a tempature guage.

post some pics with arrows or a basic idea where the wire and the sensor should be i dont know where it has gone i dont see any hanging wires... but i do know i accidently popped one of the engine when i was changing spark plugs a few months ago

Thnx guys Wes

 

On the drivers side between the first two spark plugs is the one for the temp guage, and on p/s is the temp switch between the back two spark plugs. And in the front of the engine(I think it screws into the intake manifold) is another temp sensor. Can't remember what it does though.

 

thanks for the quick response i love thirdgen.org gives me goose bumps lol

appretiate it bro just saved me about 2 hours worth of work

 

my temp sensor on the passanger side tells my fan when to go on... it rides really close to my headder... lets say one day it happened to sinch off, could i temporarily wire it to one of the other temp sensors?

 

I think it turns the fan on when a certain temperature is reached. I don't think you can wire it to another sensor. You could probably splice into and run it to a switch to turn the fan on when you want.

 

No you can't wire the fan switch wire to anything but a fan switch.

The CTS in the intake, and the temp gauge sender in the driver's side head, are both variable resistors. The fan switch is a set of contacts that are either open or a direct short between the wire terminal and ground depending on the temp, designed to drive a relay.

You could installt eh fan switch someplace else, as long as it was immersed in hot (not freshly cooled) coolant. For instance, a port at the front of the intake manifold near the water outlet, or in the water outlet itself. The port on top of the water pump is in cooled water returning from the radiator, and WILL NOT work right for that function.

 

when i was putting my engine back together, i didnt know what the wire was (it was green), when i touched it to the screw on the carburator that the air filter housing screwes onto... the fan went on, why is that?

 

because when the coolant reaches a certain temperature, all the fan switch does is ground that wire. you grounded it in another way, but as long as it is grounded, the fan will turn on.

 

so worst case senerio, im drivin along and the wire sinches on the headder and the car starts to overheat... i can take the sinched wire and ground it, right?

 

probably a better idea to find some way of keeping the wire off the header, but yeah i guess that would work

 

does anyone know the part number on that temp sensor, because i have been to 2 different part stores, with the sensor in my hand and all the sensors they gave me did not work.

 

I bought this one and like it very much. http://store.summitracing.com/defaul...=egnsearch.asp. Its part number HYP-4028.

 

If you uttered the word "sensor", then that's why you always got the wrong thing. It's not a "sensor" at all.

Its name is "fan switch". Not "sensor" anything. They'll have it.... you can believe it. Lots and lots of cars use the same one. But only if you ask for the right thing.

 

oooo i c
I think im going to order the HYP-4028 that transporter reccomended, it turns the fan on at 185 and off at 170... and I will combine that with a 180 degree thermostat.
by any chance does anyone know what the stock fan switch will turn the fan on and off at?

 

somewhere over 200 degrees, i forget the exact temp

 

i just checked 2 seconds ago and according to the gauge which reads:
100 - line - 220 - line - 260

when it hits the line between 100 and 220 (which my best guess is 160) the fan turns on.

I am just about to buy a fan switch from summit and i am installing a 180 degree thermostat, should i get the switch that turns on at 200 and off at 185 or should i get the switch that turns on at 176 and off at 166?????

On Summit:
HYP-4028
HYP-4026

 

I'd go with the 200/185. I wouldn't want the fan turning on before the thermostat even opens.... that'd be pointless.

 

Hey got a quetion i just bought a 1987 trans am gta with the 305 5spd. im having a problem with the digital dash. the temp guage does not work and everybody said to change the temp sending unit.the problem is i cant find it ik it on the driver side but i dont see it. anybody got pics. thanks

 

No pics. The sender is in the LH cylinder head between the two front-most spark plugs(1&3). The stock exhaust manifold blocks your view of it, but it's right there under the manifold. Remember, when we say left or right, we mean as viewed from the driver's seat. Not from the front of the car. So, the LH cylinder head is to your right as you stand at the front of the car.