#Engine idle shutdown timer how to#

When oil temp is down to 32 degrees F minimum idle speed is almost 900 rpm. Here’s the thing…nearly all DDEC factory programs raise minimum ide speed when oil temperature is low. He wanted it to automatically restart at 32 degrees F. The optimized idle system will restart the engine when the engine oil temperature drops below 60 degrees Fahrenheit. If after two attempts the crank doesn’t stay spinning then the optimized idle system shuts off.Īnyways my MK60 guy wanted to cut back on how frequently his optimized idle system was starting the MK60. First by sounding the startup alarm followed by two cranking attempts. A few weeks later I convinced the optimized idle function in one of my DDECs to attempt an automated startup. He ended up making a compelling argument so I upgraded my test bench to support the most common optimized idle outputs then I got to tinkering with it. I told him his request was a little unusual but as I would soon find out, there are some owner operators who love optimized idle. He also wanted some custom programming work done to the optimized idle system. An owner operator send me in a DDEC IV powering an MK60 that needed set up for a 2001 International. I didn’t fully appreciate optimized idle until recently. Optimized idle monitors all the inputs that cruise control does plus it initiates self-checks on its outputs making it the DDEC III/IV function with the greatest number of activation requirements. An optimized idle system on a 20 year old truck is finicky at best. By the time they got to me they didn’t want to fix it, they just wanted it gone.

I’d listen to stories from frustrated techs, service managers, and owner operators who tried to keep optimized idle systems working but always seemed to end up staring at a check engine light that wouldn’t turn off and can’t be cleared.

#Engine idle shutdown timer how to#

Once I learned how to disable the optimized idle feature in a DDEC that was all I did with it. There was a time when “Please remove Optimized idle!” was written on almost every work order that came across my desk.