High vs low idle question

What is the year and make of the truck? Newer trucks do not need to high idle while older trucks do in some cases.

 

What is "wet stacking"?

 

Fuel slobber in the exhaust.

 

That would be a variety of different trucks from 2016 to 2019. Interestingly there is the exception of Penske trucks, they actually required High idling or they would idle shut down. So I guess Penske and my employer have different philosophies on idling

 

That's just the by-pass for the idle shutdown.

 

Just a setting in the ECM..

 

So the takeaway that I am seeing so far; unless temperatures are approaching freezing outside it makes no difference whenever a modern engine is high idling or low idling. Does that sound about right?

 

I kick up my idle regardless. One bump brings it up to 850. This is in a ISX 15.

 

I was always told by Cat mechanics, if you have to idle set it to at least 1000 rpm. Reason they say is 1000 rpm will have higher cylinder pressure than 700 rpm and combust fuel better leading to better engine health long term.

I rarely idle, in fact I hate idling. I have an espar for winter and a rooftop a/c for summer. Sometimes I have no choice say when under a crane and they want you to pull out as soon as the lift but, the riggers are taking forever to connect.

This is on a 97 3406e so maybe a different animal compared to newer trucks.

 

x-15 engine manual says when prolonged idle is necessary at least 1000 rpm. I don’t at 1000. I used to have it set for 750 on the first bump of my cruise but now have it on 850 for the time being.