IDLE TIME LENGTH

[evldsl]

I need to idle my truck in 80 degree weather with the air conditioning running for 5 hours, will this harm my 2018 3500 truck

 

[Topzide]

We have a great feature built into our trucks to help with that. With truck in park and E brake engaged, turn on the cruise control, press the set button. This with turn on the idle up feature, RPM's will go to 1000RPM's. You can increases to 1500 RPM's by tapping the accell button. This helps with wet stacking and allows engine to turn at better rpm as if driving. Hope that this helps with needing to run the truck while stationary.

 

[lpennock]

At least on my 18 it doesn't matter about the e-brake. The hi idle feature will work either way.

 

[Topzide]

At least on my 18 it doesn't matter about the e-brake. The hi idle feature will work either way.

Sometimes, better safe than sorry! Yes, it will work either way, but stated it as manual states.

 

[AH64ID]

Sometimes, better safe than sorry! Yes, it will work either way, but stated it as manual states.

My manual states nothing about the the exhaust brake to use the idle up feature.

Also, it goes to 1,100 rpms at activation.

 

[lpennock]

Think Topzide meant the Parking brake. Alot of us old timers call the parking brake the Emergency Brake

 

[BigPapa]

Are we talking EMERGENCY brake or EXHAUST brake? I’ve not owned anything newer than a 2nd Gen, myself, but I recall the Ford ambulances we worked on would go into high idle if you set the parking brake and some of our buses do the same.

 

[AH64ID]

Think Topzide meant the Parking brake. Alot of us old timers call the parking brake the Emergency Brake

Ah yes, probably …. But generally in the diesel world e-brake is exhaust brake. Emergency brake or parking break is that. Manual does call out parking brake use.

I still call it an emergency brake when talking about it, but not an e brake.

 

[Turbo Terry]

Exhaust brake in winter and high idle. Summer no exhaust brake with high idle sound like a good plan. Good thing these new trucks are more quite that the old 2 nd gens.

 

[lpennock]

You can leave the Exhaust brake on all year long. The computer shuts it off once the engine is at operating temperature.

 

[AH64ID]

You can leave the Exhaust brake on all year long. The computer shuts it off once the engine is at operating temperature.

Yep, and even then it’s not really needed as the ECM already closes the turbo vanes more with a cold motor. I personally don’t use it, when the motor is really cold the EB doesn’t go on full and on previous motors I saw the EB push soot into the oil with a lot of cold engine use. (Yes different, more back pressure all the time). Just not a lot of reason for it based on what I see with VGT position with and without the EB on.

I would likely turn it on, with a warm motor, for prolonged idling in very cold temps incase the ECT dropped too low. A winter front is also crucial for maintaining ECT and good combustion.

It will help, slightly, with cold warmup but does nothing on a warm motor, regardless of the ambient temp.

 

[Topzide]

That's why I posted E brake vs. EB! It's technically an Emergency brake since if you've lost a brake line, it's all you got!

 

[AH64ID]

That's why I posted E brake vs. EB! It's technically an Emergency brake since if you've lost a brake line, it's all you got!

I see E Brake and EB both used for exhaust, gonna have to pay more attention I guess.

I did lose a brake line several years ago, exhaust rattled off on a rough road and cut the line on the rear axle. Thanks to the manual transmission and the exhaust brake I was able to make it 30 miles to town where we crimped the line at the “T”, it still leaked but I could use the brakes a little. Made it the 280 miles home and only had to tap the service brakes 4 times.

So it that case the exhaust brake was my emergency brake

 

[Topzide]

Just so confusing with these trucks have an exhaust brake and an emergency brake! My thinking is towing = exhaust brake. Anytime else = emergency brake.

 

[AH64ID]

Just so confusing with these trucks have an exhaust brake and an emergency brake! My thinking is towing = exhaust brake. Anytime else = emergency brake.

If only Ram would change the official name

 

[BigPapa]

Hey, they could call it a Jake Brake…

 

[MarkEagleUSA]

Just so confusing with these trucks have an exhaust brake and an emergency brake! My thinking is towing = exhaust brake. Anytime else = emergency brake.

It's technically a parking brake to be used when you... wait for it... park!

It's not meant for emergency use because when you step on it it locks and that could cause a loss of control. Proper use is either on or off.

 

[Turbo Terry]

You guys are very funny

 

[AH64ID]

Hey, they could call it a Jake Brake…

Back in the day sure, on the OEM 5.9 Jacobs brake. But now wouldn’t it be a Holset brake?

It's technically a parking brake to be used when you... wait for it... park!

It's not meant for emergency use because when you step on it it locks and that could cause a loss of control. Proper use is either on or off.

So I went and looked in the manual. Nowhere does it talk about using it as an emergency brake, just that it should be used for parking all the time. The manual is very clear that park should not be used as a substitute for the parking brake.

That’s also how I’ve taught the wife to park, and the kids as they are learning to drive.

I still call it an emergency brake often, probably should brake (intended) that habit.

 

[Tuesdak]

It's technically a parking brake to be used when you... wait for it... park!

It's not meant for emergency use because when you step on it it locks and that could cause a loss of control. Proper use is either on or off.

It’s only got to work once during an emergency. Sadly they are so small anymore that they may not hold long enough to stop. Or strong enough to lock up the tires.

Had an AutoZone brake pad come off the backing plate with a loud thunk. The brakes took 3 pumps to start working… the 4th was going to be with the Emergency brake full on stopping in someone’s back seat. Old obsolete drums where you pull the release handle to use em to control any wheel lockup. The steel backing plate trashed the rotor in 7 miles. Guess what I don’t use anymore…

The 2020 GM gasser around requires the Parking brake to get high idle. It’s such a weak holding power parking brake system “Why do they even bother?” Not a good idea to expend them once just to learn how to use them like you did to learn how to hold the handle when using only old school “emergency” brakes to stop.