If there's talk of t-shirts, I'll take a large.

 

I'll take a XXL.

Thanks for the video, Pockets, good myth busting.

 

Yes. Thanks Pockets.

Now would you do a side by side video of heat-up rate Stant versus Factory stat?

 

Best post here. Agreed! LMAO

 

........and the apples-2-apples way to do that is to take your 3 Stants AND your Mopar, drop 'em all in a pan of water at the same time, on top the stove, using a cooking thermometer. Got your video camera????? We're waiting..........LOL.

 

U r not the least bit curious about a heads-up comparison?

 

That's too much work, LOL. I do have a 180* napa stat out in the toolbox. Not sure if I have another 195* napa around, and certainly lack the motivation to take out my dealership MotoRad...

 

I was hoping maybe Mr. cruiser would jump on it since he has a Mopar and 3 Stants.

Lot's of work yes, but would be interesting to see. If nothing else, folks could see how a stat opens/closes slowly, hovers in an infinite number of positions between open/closed and what wide open looks like.

 

I warranteed the 3 Stant pieces of crap and got my money back. They're MIA at this point.

 

Agreed. That was my first thought looking at that page. I've been known to do the same thing in the past only to find out generalized applications do not apply to all. That's why they are generalized.

 

The open and closed loop status is one thing that makes no sense with that ScanGauge (how does it reference a closed vs. open loop status?), but I've read elsewhere (not on this forum) that it is supposed to run rich until the designated operating temperature is reached. NOT because of emissions, but because of proper oil temperature to improve engine longevity.

What model year was that attached to? Was it a 99+ model year with increased emissions standards that have the heads that frequently crack? I can tell by the dashboard layout it's at least a '97.

 

Which one?

 

Another +97 model. I want to see someone find the application of a pre-'97 model instead of saying what they see on their +97 model with a program, that they don't specify how it references open vs. closed, signifies a closed loop status.

Can anyone even tell us what all parameters must be met to signify a closed loop status? OBD-II exists for emissions purposes. Pre-OBDII systems will not respond the same. That is why you have this "myth" (not a myth, a truth from the older era OBD-I systems) that closed loop is based on 02 readings. If you have OBD-II, yes. If you don't, NO.

Hang out by the muffler and smell the fumes coming out and tell me if you think that is "closed loop" after letting it run for 30 seconds per the video. If it smells like un-burned exhaust fumes, especially after passing through a catalytic converter, it clearly is NOT in closed loop.

 

When the O2 sensor(s) reach operating temp, +/-650F, the loop closes. Closed loop is when the O2 is signaling the ECU with air/fuel ratio info so the ECU can constantly adjust the air/fuel ratio. When the system is in open loop, the ECU is adjusting air/fuel based upon preprogrammed parameters. Again, the loop closing has nothing to do with coolant temp or oil temp.

There r 3 posts in this thread with scan tools showing/stating the loop closing well before coolant temp reaches so called operating temp.

Cruiser54's post #31 is for a pre '97.

 

It reminds me of an auxiliary transmission cooler/ operating temperature of the AW4 thread.