I just experience the high idle coming on after some minutes of the truck idling after a cold start since it has gotten cold here in Ky . It concerned me and it was a relief to see this thread .
Does my 05 does this because it had a recalled or and ECU update or do all 05 6.0s do it fom the factory ?
Thanks, read some of the thread not all of it.
Roberto.

 

All of the 6.0L do that when the amibent is below 40F...and only when the oil cold. I don't have all the parameters...but there's a couple of things the PCM is looking for before it idles the truck up. If the engine is up to operating temp...it won't idle the truck up; unless you've done the high idle mod.

 

will this mod:
3 - 04:
http://dan.prxy.org/Truck/Other/High..._idle_mod.html

work with my 2004 F350 with a manual transmission?

 

The manual tranny equipped SD aren't able to "high idle" like the slush boxes are. Sorry to be a barer of bad news.

 

ours will if the e brake is set and in neatrul. well i guess you would have to be in neatruel but anyway it does go to high idle just like my o4 does in cold weather

 

Are you talking about a 1100rpm (-ish) PTO high idle? Or a cold weather warm up (900-ish) idle? A company I used to work for had a '04 F350 with the 6-speed; it would idle up to about 900 rpm when it was below 40F. It has been my understanding that the gear grinder equipped trucks don't have the necessary wiring for the PTO high-idle mod.

 

That is exactly how mine works (min is a 05). I wired this up the other day, this mod works perfectly. I get in the AM, go out fire her up, set the E brake, and flip up #4 switch. She'll rev up to around 1300 RPM, and i'll let it sit for about 5-10 mins. By then heater is blowing hot, and EOTs are around 150-160ish.

Thanks again for the detailed info fellas..

 

it does the 900 to 1000 rpm idle up but it was also a mechanics truck it has a pto installed so i think it would also have a high idle for that too. not sure how they worked the pto high idle but i do know that it will auto idle up when cold.

 

After reading more responses about the benefits of the high idle mod, I am definitely "in." Plan to do this over the weekend, just need to find a place for the switch since I don't have the upfitters on my truck. Thanks to everyone for your responses. Not only will this help me warm my truck up in the morning this time of year, but now that I've heard some of you guys are using this for the AC it will help a lot in the summer too. I always thought the high idle mod was for snow plows or service trucks.

My next question is kind of off subject but I'll try anyway. You guys using the remote starters, does the system you have disable someone from driving off with your truck while it is warming up?

 

You might be able to get the entire harness out of a donar at your local salvage yard. Or you might give Ed @ Part's Guy Ed a ring/email and see what he can hook you up with. All the brackets are behind your dash if you want to run that "stock look". Though there are some nice looking a/m switches out there that you could use as well...too each their own.

No clue, sorry.

 

Yes it does, there is no key turned in the ignition so nothing powered by the ignition will work, like wipers and so on. Also once you hit the brake the truck shuts off. I am running a astrostart brand.

 

Hi, Not a diesel mechanic & would like to know the purpose of these higher idle speed mods. Does the nornal idle speed hurt the engine or is the higher idle speed just better for it? It seems like if the slow speed is not as good Ford would just flash the faster/improved idle speed into the trucks computer.
When I started my up last night at 28 degrees it ran fine but after maybe a minute or so it did up the idle speed. But after I drove away & was warmed up the idle speed showed about 650 rpm on the stock speedometer. Thanks & great trucking.

 

Sounds good, I'll look into each of those options. If I had the upfitters I'd use them for high idle, heated mirrors, and heated seats. I don't like the fact that the mirrors are on all the time, and the seats well who knows. Saw a cool mod a while back where someone installed LEDs on the console to indicate when they're on. Maybe I'll just hook something up temporarily for high idle until I can get an upfitter set. Only thing is, I use the pocket where they would be for my cell phone. It fits perfectly in there. Guess I'll have to figure something else out for the phone.

Your post about wet stacking got me thinking today about an issue my truck had when I first got it. I had a high pressure oil leak, ended up being the dummy plugs, which really are like o-rings as far as I know. Since diesel fuel causes rubber to swell, I wonder if wet stacking could actually cause breakdown of the dummy plugs, or any other rubber components exposed to engine oil and cause those sort of issues.

 

Thanks for the info. Looking in to this brand and some others.

 

Zhil has some good info, and he is right as far as he goes. however wet stacking refers to wet black creosote drool out of the stack. this happens because the combustion temp is so low that part of the fuel just turns to creosote. that's the stuff that causes chimney fires if you burn too much green wood. as far as damage from reving it up to so soon. there is simply no danger there. the 7.3 and the 6.0 both CAN'T fire the injectors until the system has built oil pressure. as long as you are not also instantly putting the engine under load the rpm won't hurt it.

bending push rods.almost every time it happens it is on cold start up. some owner has left it sitting and slobbering on low idle, WETSTACKING. the exhaust valve stems get coated with creosote or roofing tar. as long as it is fairly warm the cam and valve springs can still move the valve. but then they turn it off without having driven it long enough to get it hot enough to vaporize this ****e. once this stuff gets cold the valves are nearly welded in place. the cam tries to close the valve, and the pushrod drops free, because the valve spring simply can't overcome the tar. or the cam tries to open the valve but it won't move an CLACK CLACK CLACK. bent pushrod. that is wetstacking and why you want it not to happen