robert78.5

I got a remote start installed, works great but when truck goes into high idle it will run good for a few minutes at high idle but when it goes to cut into 3 cyl idle , it shuts down, than it will automatically restart after a couple minutes than shut down again on 3 cyl idle. Works great at warmer temperatures, will run for the preset 20 minutes. Is there something the shop is overlooking?

robert78.5

Mechanic said maybe there is a rev protector on remote system, he is going to check it out.

robert78.5

Is there a high idle download without the 3 cyl idle?

Busboy

here is the TSB 18-019-01
Date: September 3, 2001

Models: 1998 1/2-2002 BR/BE Ram Trucks

NOTE: THIS BULLETIN APPLIES TO ALL RAM TRUCKS BUILT AFTER DECEMBER 17,1997 AND EQUIPPED WITH THE 24-VALVE 5.9L CUMMINS DIESEL ENGINE.

Discussion:

This bulletin involves selectively erasing and reprogramming the Engine Control Module (ECM) with new software (Cal 55Tl8, 57Tl1, 56Tl3, 59T7b, and 59T8b.)

Symptom/Condition:

Extended idle operation, especially in cold weather, can lead to stuck valves and bent push-tubes due to insufficient cylinder heat. This allows varnishes/oils to condense on the exhaust valve stems, leading to stuck valves, and damaged valve train components. 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.

Once enabled, idle speed will slowly ramp up from 800 rpm to 1200 rpm when all of the following conditions are met:

1. Intake Manifold Temperature less than 0°C (32°F) and,
2. Coolant Temp is less than 60°C (140°F) and,
3. The Transmission is in Neutral or Park and,
4. The Service Brake pedal is not depressed and,
5. Throttle = 0% and,
6. Vehicle Speed = 0 mph

Additionally, if Intake Manifold Temperature (IMT) is less than -9°C (15°F), 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. This allows the engine to create increased heat in the cooling system, allowing more rapid engine warm up and cab heating.

Both features will automatically disable when one of the following occurs:

1. The Automatic Transmission is placed in gear (forward or reverse) or,
2. The Service Brake pedal is depressed or,
3. Throttle position is greater than 0% or,
4. Vehicle Speed is greater than 0 mph or,
5. Coolant Temperature is greater than 79°C (175°F).

Engine speed will return to normal operation at 800 rpm. If the engine continues to idle and coolant temperature is at or below 60°C (140°'F), the feature will reenable. In order to operate properly, the Accelerator Pedal Position Sensor (APPS) must stay at idle.

NOTE: ANY TYPE OF AFTERMARKET IDLE SPEED KICKER THAT ACTIVATES THE APPS WILL DISABLE THIS FEATURE.

Use of the 110V block heater will not allow the feature to function after an overnight soak. If the vehicle is left idling, without use of the block heater, 1200 rpm operation will begin when the intake temperature drops below O°C (32°F) and coolant is less than 60°C (140°F).

Busboy

I've been mulling over your problem since you first posted, I have installed many remote starters just non on diesel trucks and I wouldn't install one on my manual trans 2001. When the remote goes to start it's interrupted by the wait to start light being on for the grid heaters, I wonder if the grid heaters recycle in the 3 cylinder hi idle perhaps shutting down the remote starter. I have looked through the factory wiring diagrams and the FSM but there is nothing regarding the 3 cylinder high idle that I could find.

robert78.5

I do not think it would be the grid heater as it cycles after the engine starts. The high idle starts increasing to 1200 and works good unless it is colder out and the 3 cyl idle tries to kick in. Than the engine dies, waits a few moments than the remote start fires it up again and repeats the idle process. Up to 1200 than tries to go into 3 cyl idle mode aand quits.