3500 cts?

[gar70614]

my 3500 is runnin on a 99 grand am pcm and ideling at like 2500 rpm. i realized its prob because the pcm shows temp at -38 degrees. seams to be a problem lol. im using a brand new cts for a 3500. should the ga pcm be able to read the 3500 cts or do i have a wiring problem?

[geldartb]

im using the 3500 coolant temp sensor on my 99 grand am and mine runs fine.

never had a problem with it. its a 2 wire sensor like the Grand am is.

3500 top swap and i just went and bought a CTS from GM for a 2005 G6.

[gar70614]

yea its a two wire just like a ga but the threads r smaller. ok good to know ir works i might just have a wire crossed or somethin.

[SappySE107]

Correct, and I just listed the CTS extension for the 3500 sensor using the 3400 wiring harness. Both 3400 and 3500 CTS have the same resistance values.

[geldartb]

i still have the old hook up in my injector harness. all i did was run a separate wire like it was done in the factory.

it was easier this way for me since i already had the wires separate from another harness.
you can see it in the pic here. it was long enough to reach the sensor and i didnt have to disturb the harness on the car.

http://i60.photobucket.com/albums/h5/95blackz26/Engine%20Build/Picture023.jpg

the sensor is cheap from gmpartsdirect. iirc it wasn't more than $20 for the sensor.

[gar70614]

how would i go about finding out the resistance of a sensor. i think i may have found a three wire that will fit but want the check to make sure it will read correctly after i verify the thread is in fact correct. could i put a ohm meter on it and then a 3500 one that are both at the same temp and see if the show pretty close?

[finalcount09]

how would i go about finding out the resistance of a sensor. i think i may have found a three wire that will fit but want the check to make sure it will read correctly after i verify the thread is in fact correct. could i put a ohm meter on it and then a 3500 one that are both at the same temp and see if the show pretty close?

Yes you are correct. If they are about the same temp, they should ohm out about the same.

[boomofdoom88]

I used a 3400 CTS and just Tapped my 3500 lim for it. Uses a 3/8 npt tap. Simple to do and wont require any modifications to the harness

[2.8-350TBI]

You may want to check the wiring to make sure it isnt grounded or shorting out anywhere too...