I want high idle
Is there anyway to get my 8.3 cummins to go on high idle? I drive motorcoach bus and on them you just set the cruise in order to get them bumped up to 1100-1500rpm while sitting.. I've tried that on m...
Forum Discussion
msmith1199 wrote:
I have a question, why exactly do we want to idle our engines at a higher RPM? I have the Cat 330 hp and I don't recall reading anything about a high idle or why I would want to do that.
High idle is very necessary especially in cold climates. As we all know diesel engines cool down rapidly on idle, therefore if left at "Low" idle we get a lot of fuel build up in the cylinders (unburned fuel). If we bump up the engine RPM from idle to say 1100-1400 rpms it eliminates the unburned fuel (theoretically speaking) and keeps the engine at a decent temperature and there you have it.. When I drive motor coach and if the temp is below 32F we are instructed to keep the engines running at all times. Even overnight if there is no plug ins. I've seen these engines run for hours on end with no problems as long it is at a higher RPM. One big note though is the newer engines with particulate filter and regen, that's a whole different ball game and they want those engines running at at least 1400 rpm at idle, or do not idle them at all... Kinda sucks.
