MM.Thanks for the update. Very interesting how Cummins and Detroit Diesel approach this differently. I think I like the Cummins approach better because you can basically get moving within 10 seconds of starting the engine.
You must have a miraculous air pump. You can't get underway until you have enough air pressure to release the parking brake.
6 pages of people all who ignore the two people who told you the proper procedure. I love the responses from people who have so much money they don't care if they are doing something that is damaging to their motor. The only one not heard from is someone who starts his engine and holds it at 2500+ to warm it up.
Now the original question was.
"What are best practices for idling and what are the theories behind them", not how fast can I drive away.
The best practice, according to Cummins and it matches what I have heard from Cat. When starting a cold engine you should go to fast idle as soon as the oil pressure comes up. The facts behind this not theory are the cold engine will not burn all the fuel and it will wash down the cylinder walls(creating excessive wear)and contaminate/dilute the engine oil.
The next thing is it creates carbon build up on injectors valves rings and can lead to injector failure and loss of performance.
If it is cold out your engine will never reach full operating temperature at low idle.
Now if you want to get underway quickly... Well go back and read what wolfe10 has posted I don't feel like re typing it.
Bill
