Adjusting Idle on 5.9 Cummins
I have a 1998 Gulf Stream Sun Voyager Diesel pusher, 5.9 liter 12 valve Cummins with Allison 4 speed trans. When I start the engine (starts right up) it idles around 700 rpm. When she warms up she s...
Forum Discussion
mpfireman wrote:
Cummins engines have no glow plugs, but a heat grid that pre heats the air prior to ignition. This heat grid will cause the engine to idle faster, ( sometimes ) as it is re charging the battery. Thus as stated, you may have to rev up your engine for a few seconds, thus allowing the RPM to drop into the safe zone.
If you have a 12 valve then you do not have a grid heater. There are also no glo plugs. I am not sure what is advancing the rpms maybe some additional information such as what happens if you rev the motor and then where are the rpms? or how long after the start does it take to get these higher rpms?
