High Idle Mod

[mdavis203]

I've been doing a little bit of reading in here, and I've got some questions concering the high idle mod.

First, I want to make sure I understand the purpose of it. From what I've read, you should never let the engine idle for more than 10 minutes at "normal" rpm. I'm not 100% sure why, but I take it that it's bad for the engine. For various reasons, like warming the truck up on a cold morning, you may want to idle more than 10 minutes. This is when you'd use the high idle mod. Am I understanding correctly here?

Second, I'd like to know what's involved in doing the mod. I've got the upfitter switches, so it shouldn't be a big deal, huh? What's the procedure for doing this? Tie a couple of wires together? Is there a good, illustrated set of instructions somewhere? Are there any negatives to doing the mod?

Thanks in advance from a diesel newbie!

[TommyBoy#1]

6.4 High Idle mod - Powerstroke Nation

here is how to do it ive never heard anything about ten minutes i used it in my 7.3 for turbo cool down and truck warm up

[Larietguy10]

Originally Posted by TommyBoy#1

6.4 High Idle mod - Powerstroke Nation

here is how to do it ive never heard anything about ten minutes i used it in my 7.3 for turbo cool down and truck warm up

I've been searching for this myself. Thanks for the post!

[TommyBoy#1]

Originally Posted by Larietguy10

I've been searching for this myself. Thanks for the post!

no problem ive been doing alot of reading on the 6.4 as i just sold my 7.3 and am buyin a 6.4 when i get back from deployment

[Shinny]

I'm not a mechanic but I've been told that idling causes wet stacking. That's sending unburned fuel into the exhaust. We have the DPF, which would collect the unburned fuel and clog it. That's why it can't idle for more than 10 minutes. I use it in the summer when I'm hooking up my camper and have the A/C running.

The mod takes 2 minutes, just butt connect the two wires. One of the site Mods put a sticky up with the SEIC wiring diagram to determine which wire you want to use.

[abruno25]

i heard the same thing, with the fuel stacking and cloging up the dpf. i have a quick fix for all of that, take the cat and dpf right out!!!!! you will be suprised how your truck will run when you take the cat/dpf out and you wont have to worry about letting it run

[JBB1970]

If memory serves me The "Wet Stacking" is more than just clogging up the DPF. It can collect in the cylinder walls and eventually damage your engine by seeping past the rings, getting into your oil and diluting it with fuel. Even if it does not make it past your rings initially, Diesel fuel will still act as a solvent in your cylinder.

[Eagle 33]

is there a write up for the High Idle Mod on a 6.0?