Ok, so my car has been this way as long as I can remember, it just doesn't seem right though.

The electric fans won't ever run unless the AC is on, it will heat up to 223 without the fans ever coming on but as soon as I turn the AC on it will cool back off to <190.

Is the sensor broke possibly? Are they all like this? If so that's a shitty ******* design.

 

sounds like a sensor isnt working, the PCM tells the fans to turn on at certain intervals unless you tuned it in HPtuners to come on soon/later.

 

coolant temp sensor?

 

Fans aren't supposed to kick on till 225 iirc. You can change that with hp tuners. My tuner changed mine to kick on at 200.

 

mine kick on at like 190 i think

 

First fan should kick on at 190. 2nd fan not till like 225. Ive never seen temps higher than 226 since the 2nd fan kicked in and dropped it to 185.

 

Ok, well I guess its just a shitty design then... Why would they do it like that!? That's retarded!

 

My fans don't come on at all unless the AC is turned on.

 

not sure haven't go my car that hot to find out only comes on when th ac is on

 

Its not a shitty design...The car is designed and made to run that way. If it did that and it wasnt designed to run that way then yes i would have to agree with you. But the ecotec motor likes to be hot!

 

But heat soak sucks, you sit there for like 3 minutes or drive in traffic for a very short time and suddenly your coolant is 210+ with IAT2 of 150+

 

Stock- kicks on at 225

 

your sensor seems bad if you have to turn the AC on to get it to work.

 

But if the sensor was bad he also wouldnt have a correct ect reading on the dash or in the scanner.

 

how do you get your temps up that high i can sit at the bank for 15 minutes in drive and my temp won't go past 196 driving it stays at 190 so im not sure never had the fan kick on without the ac on i know sunday im changing my t-stat cuse the seal around it it deteriating so it flatlines the dic coolant temp

 

hmm this is true.

Thermostat fail?

 

Its not an sensor
He says it goes up to 223 without fans kicking on
The reason that is because it goes on at 225

 

You live in TX...you will heat soak with any cooling setup. lol

 

Let it sit and let it go to 225 and see if it goes on

 

Thats the best idea, just dont let the temps get over 250. I think these fans have two different relays for speed 1 and speed 2 (or the difference is in the fan, cant remember for sure). Your fan one might be dead.

 

I have never seen an stock tune lsj's fans turn on before 225