Originally Posted by ajpulley

When I used to drive an OTR Peterbilt, I wasn't supposed to idle at a low RPM, ever. It goes without saying that all of us idled when the truck wasn't moving: for A/C in the summer or heat in the winter. Sorry, the engine was a CAT 3406E, but the point is eveyone's engine idled in the winter. The cruise was set so you hit it and it idled up to 1,100 or so.

The point to this is idling up wasn't about warmth primarily, as it was to keep from developing "slobber" as it was called. Don't know what it was made out of, but it was like liquid and would spit out the stacks. That's why, as all the mechanics told me, not to idle at less than 1,000-1,200 RPM. Maybe worth investigating.

Originally Posted by jrs_dodge_diesel

That is what is refered to as wet stacking. Its basically unburnt fuel from low combustion temps. It builds up on the valve stems too. To much of it can gunk up and bind the valve, never a good thing. This is why prolonged low idling can be a bad thing.

Originally Posted by ajpulley

Thanks for letting me know. Can I assume it would happen to our little diesels too?

Originally Posted by Sea01Cummer

I fire mine upand wait a second till i got oil pressureand flip the brake on. I go back inside, fill my thermos, go feed the horses and by the time i get back to the truck and we are not talking 10 minutes either the heater is blowing warm air ant the temp is up from 140. Did i mention i love my exhaust brake.

Stevo

Originally Posted by j-dubya

do 2000's have the high idle already in the ecm awaiting activation?

Originally Posted by jrs_dodge_diesel

A cheap way to raise your combustion temps and raise up the idle is to use a stick. Wedge it between the seat and the pedal. Works good.