Factory put in 195* stat. That's good enough for me.

 

Here's a pic that I've post numerous times.....the ScanGauge clearly shows the OBD-II system has entered "closed" loop way before 195F. When this pic was snapped, coolant temp was 94F. The O2 sensor is what "closes" the loop, not the coolant temp sensor.

Let me ask this question of u.....if the heated O2 sensor reaches operating temp within seconds of motor start-up thus signaling lean/clean running info, why would the system need to wait say +/-10 minutes for coolant temp to reach 195 to start signaling lean/clean running info? The sooner the motor starts running lean/clean the better, no?

Does anyone have an O2 sensor blurb/info stating something different than the blurb/link I post??????

 

.....and the Factory offered a 180F stat thru the dealerships. I would think that would be good enough as well.

 

7000rpm? Lol

 

780.

 

I would say I'm dyslexic but I don't think it covers that lol

 

You could think so, but you would be mistaken.

You're confusing factory original assembly line procedure versus an optional field service replacement for many engines and car lines.

 

I'm not confusing/mistaking anything......195 and 180 r both acceptable by Jeep factory engineers.

 

Fast idle.....motor was cold, but the "loop" was closed.

 

DJ is absolutely correct. This is a longtime and popular myth. You can verify this on OBDII Cherokees using a bluetooth OBD adapter and Torque Pro. It has an option to show fuel status, and you'll find that when you start the jeep up, it goes into closed loop rather quickly.

If I remember to, I'll try to record a video of this later.

 

Sure, if they live in south Texas, Florida or California. Or Hawaii.

If they actually want good heat, they put in the 195.

 

We see mid-teens every winter. The 180F Stant SuperStat has been in our XJ for 4 plus years. The heater will make u sweat even in mid-teens ambient.

 

Thanks Mr. Pockets...................... Looking forward to the video.....it will be a great teaching aid and myth buster.

.........and the O2 sensor, not the coolant temp sensor, is what "closes" the loop on all other vehicles, not just Jeeps, as well.

.........and the t-stat does not have to be a 195F.

 

I ride around in short pants and a t-shirt in mine at 0 degrees, because I have a MOPAR 195* thermostat.

All the while drinking ice cream slushes from Sonic.

 

I have a 160 degree thermostat in my Firehawk, and it gets plenty damn hot in the car!
Turn your hot water heater "UP" to 160* and see if you can keep your hand under the faucet for more than a half second!

However, for the OP, you should get rid of the "Failsafe" thermostat........
I had two in a row fail open at regular operating temperature.........
Once was in December when we had a super cold snap..........Drove to work for a few days freezing my *** off, cause the Jeep didn't even reach 100 on the gauge...........It was below zero that week