Did a search but didn't find exact question so..I went into work yesterday and a service truck was parked by our entrance with the back open and it was idling (not a big deal, happens often) I went ba...
Couple of reasons why drivers let their diesel engine idle: 1) Turbo temp needs to come down if the EGT is too high. Most engines need to idle for a couple of minutes to achieve this. 2) Driver ignorance. It's a carry-over from the past. Differences in fuel and oil and engine technology have made most idling unnecessary. 3) Driver arrogance. It's the "look at me, I'm a big bad diesel driver" syndrome. Sounds silly, but its true in too many cases.