9/18/2023 0 Comments 24v cummins high idle![]() ![]() If the vehicle is left idling, without use of the block heater, 1200 rpm operation will begin when the intake temperature drops below O☌ (32☏) and coolant is less than 60☌ (140☏).ġ. ![]() Use of the 110V block heater will not allow the feature to function after an overnight soak. NOTE: ANY TYPE OF AFTERMARKET IDLE SPEED KICKER THAT ACTIVATES THE APPS WILL DISABLE THIS FEATURE. In order to operate properly, the Accelerator Pedal Position Sensor ( APPS) must stay at idle. ![]() If the engine continues to idle and coolant temperature is at or below 60☌ (140°'F), the feature will re enable. Coolant Temperature is greater than 79☌ (175☏).Įngine speed will return to normal operation at 800 rpm. Vehicle Speed is greater than 0 mph or,ĥ. ![]() Throttle position is greater than 0% or,Ĥ. The Service Brake pedal is depressed or,ģ. The Automatic Transmission is placed in gear (forward or reverse) or,Ģ. This allows the engine to create increased heat in the cooling system, allowing more rapid engine warm up and cab heating.īoth features will automatically disable when one of the following occurs:ġ. The Service Brake pedal is not depressed and,Īdditionally, if Intake Manifold Temperature (IMT) is less than -9☌ (15☏), and all of the parameters above are met, three of the cylinders will be shut off upon reaching 1200 rpm, creating a slight change in engine sound which is normal. The Transmission is in Neutral or Park and,Ĥ. Coolant Temp is less than 60☌ (140☏) and,ģ. Intake Manifold Temperature less than 0☌ (32☏) and,Ģ. Once enabled, idle speed will slowly ramp up from 800 rpm to 1200 rpm when all of the following conditions are met:ġ. A new software feature, enabled or disabled through the DRB III (See instructions under Repair Procedure), reduces the chance of valve sticking and improves cab heat warm-up time. This allows varnishes/oils to condense on the exhaust valve stems, leading to stuck valves, and damaged valve train components. This bulletin involves selectively erasing and reprogramming the Engine Control Module ( ECM) with new software (Cal 55Tl8, 57Tl1, 56Tl3, 59T7b, and 59T8b.)Įxtended idle operation, especially in cold weather, can lead to stuck valves and bent push-tubes due to insufficient cylinder heat. NOTE: THIS BULLETIN APPLIES TO ALL RAM TRUCKS BUILT AFTER DECEMBER 17,1997 AND EQUIPPED WITH THE 24-VALVE 5.9L CUMMINS DIESEL ENGINE. Works very well if you live in a colder climate like I do.(2nd Gen Cummins, 1998. Google and read tons of info about it too. A little pricey at $150 but well worth it in my opinion. Here's a website that you can buy a switch and turn it on anytime you want. Don't let them tell you they can't or it isn't there on all 24 valve cummins because it is. Any dealership can enable this feature for you. This morning we 5* temps and it kicked on high idle then three cylinder high idle and in about ten minutes I had 150* coolant temps. This is to allow the engine to warm up faster in low temps. Even has 3 cylinder high idle where it will shut off 3 cylinders which sounds like a rod is going to come through the side of the block. But, it has to meet a few temp parameters first to kick on by itself. It's in every ECM for the cummins even the autos. I've been getting 20 mpg 600 miles from a tank of fuel. It's got a Edge Juice w/attitude fuel/timing box that adds 120 hp and 350 torque on top of factory hp/tq. ![]()
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