Finally got around to installing the high idle in my '02. What a difference!! It was really nice this evening when I got back to my truck from hunting. The motor warmed up much quicker. This has to be the best mod for under $5. I followed the instructions on Kennedy's website and some other threads on this site. One thing I would add is that I took out the drivers side battery and it made getting to the TCM/ECM connectors much easier. Thanks to Kennedy, Max Power and everyone else who has posted "How to" for this mod. :ro) :ro) :ro)

It is nice, isn't it? :D

Combined with the block heater, warm up problems on cold mornings are a thing of the past. :ro)

Tom :eek:

How long of a procedure is this fix? I would like to do it!
Ben

Ben

I ordered my kit from Eric this week. He said it should only take about an hour. Since I always seem to make things way too difficult, I am figuring 2 hours.

1 hour max. I did one yesterday in 10 minutes. The first one is the hardest one but I can't see it taking more then an hour.

Well Max Power I might have to have you do it for me when I come up for my remote start.
Ben

I'd do mine right now but i don't have a Terminal GM part #12084913 . And here it is x-mas eve and everything around my neck of the woods is closed, are these connectors round or can make one out of a flat connector or something before i pull apart the ECM & TCM ?

blnagel - it's very easy... I went extra slow making sure I followed the instructions exactly and it took me 30 minutes. On '02 trucks you don't need the switch or fusetap, etc. All you have to do is tap the wire you install in the ECM C1 connector to the green/white wire connected to the brake pedal. I simply bought the GM terminal for $1.50 from my GM dealer and some 20ga wire from Radio Shak for $2.50. I already had a tap (Scotch block). Like I posted earlier, it really helps you see and maneuver if you remove the drivers side battery. Once you install it you'll wish you had done it sooner. I do... Happy Holidays!!!

Machoosh - I'm not an expert but the terminal looks fairly unique to me (mainly in it's small size - it looks like a bullet). I know that on mine, it "clicked" into place when I installed it. I would be concerned if you fabricated something you might damage the connector or ECM. My two cents.... Hopefully someone more knowledgeable will chime in.

blnagel - it's very easy... I went extra slow making sure I followed the instructions exactly and it took me 30 minutes. On '02 trucks you don't need the switch or fusetap, etc. All you have to do is tap the wire you install in the ECM C1 connector to the green/white wire connected to the brake pedal. I simply bought the GM terminal for $1.50 from my GM dealer and some 20ga wire from Radio Shak for $2.50. I already had a tap (Scotch block). Like I posted earlier, it really helps you see and maneuver if you remove the drivers side battery. Once you install it you'll wish you had done it sooner. I do... Happy Holidays!!!
Any pictures? Did you follow kennedy's web site info? I am very interested in this mod.
Ben

I didn't take any pics - sorry. I followed Kennedy's instructions down to number 19. Then I justed tapped into the green/white brake wire and was done.

I've gotta go to a relatives for Christmas so I'll be offline the rest of today. Merry Christmas!

Blnagel, there are a few pictures here http://dieselplace.com/forum/showthread.php?t=951

So how does this turn on? With the cruise button?
Ben

Is this activated with a switch? Hmmm, I see someone just asked that. ):h

If you wire it to the brake switch you just have to press set on the cruise twice. If you wire it to switch you have to turn the switch on and press set twice.

I still dont understand how to attach it to the brake switch. I am reading though kennedys info and it says to use a 12V power source. Any help would be helpful. I already bought the goodies and am awaiting help. Thanks
Ben

blnagel, here is how to do it on an LLY. The brake switch part is the same.

http://www.dieselplace.com/forum/showthread.php?t=17853&highlight=power+high+idle

So I would need to run it through the fire wall and under the dash? To where? What is this green/white wire I have heard people talk about? I am ready to do this but not sure what I do with the other end of this new wire.

Ben

through the firewall and under the dash to the green/white wire at the brake switch.

You can see the green/white wire has a little bit of black electrical tape on it. That one.

http://www.dieselplace.com/forum/attachment.php?attachmentid=98&stc=1

Brake switch? Do I follow the brake up and find the brake switch then this mysterious green/white wire is there too? I just splice into that wire?

yes, yes and yes.

Ok, ok, and ok. I think I can handle this. Sounds pretty easy. Max I might get it done and then all You would have to deal with the the remote start. ):h
Thanks ALOT.
Ben

I just ordered mine from Eric three days ago, with that and my remote start I should be nice and toasty every morning!:D

I got it working and it took me @ 1 1/2 - 2 hours. So long since I had to strip wire from a big conglomeration mess.

DILEMA --> Now my automatic lights do not come on. WTF? What does that mean? I started her up and tested the different idles and the CC and resume work well. I drove out of the garage and DING DING DING, and no lights. I pushed on the dome switch and DING DING DING --> NO lights. What gives? Any ideas?

Ben

I can't think if anything off hand. Go back and retrace your steps. :(

I will. I just have put everything back together though. Gives me another excuse to work on the ole truck. Would a fuse do this, but still DING and also have lights?

Ben

Possibly but you shouldn't have blow a fuse in the first place!

Eric told me I really had to watch plugging the connectors back into the ECM, and also not to overtighten the holddowns. You may have a pin not quite connecting, Ben.

I can't see where you could've shorted the headlight circuit in order to blow a fuse, since you don't mess with it, but I guess anything is possible.

Good luck with it.

Tom :eek:

I fingered it out. I am a dumba$$. :eek: I depressed my parking brake earlier and forgot to release it. It works GREAT!!! Why did I not do this earlier? :mad:

Ben :ro)

yeah, forgot about that. Glad to hear it works!


Tom

I agree, what a cool feature. Thanks to JK's instructions, clear and concise. I came up with a slick way to get the wire through the firewall. I melted a very small hole through the hood release cable grommet and pulled the wire through. The wire fits very snug and tight, no drilling, cutting, etc. Just take a small thin pick/awl, heat it up with a torch and punch it through the grommet a couple of times. It will transfer a small amount of grommet material to the awl, leaving a hole just smaller than the wire sheathing. Pull your wire through, thats it.

):h just finished installing high idle on my 02 GMC , wow I like :cool: . Took me 1 hour used the green and white wire off the brake pedal instead of the switch.

Thx guys for the info on doing this mod.

Now i hear theres a mod for the airbox is this true ?

Does this work the same way on a ZF equipped truck? I would prefer not to add a switch, but use the green/white brake wire for the 12v. So I'll ask my question again, does a high idle circuit on a ZF function the same as an auto???

Thanks,

MaxRock

Now i hear theres a mod for the airbox is this true ?
Search "swiss cheese air box" Its an older thread, but Kennedy posted a pic of his done.

Tom :eek:

I may have over looked it but, Does this cool Idle Mod work on an 04 LB7?

I may have over looked it but, Does this cool Idle Mod work on an 04 LB7?
yes

Great! I assume I just follow the pictures and notes Max for the LLY? I got lost here (not knowing what a loom was)...I recommend buying split loom to keep it looking factory.
Lastly you need to hook up the wire inside the cab. I recommend hooking it up to the brake switch for ease of use and a clean install. Solder it to the green/white wire on the brake switch.
Parts list ? 15' 22GA wire, Split loom,

I can see the advantages of high idle for faster warm-ups. But as far south as I am, that is not an issue. I have considered adding for more alternator output when winching, but a guy who seemed to know a little about charging systems insisted it wasn't needed . He said that our alts put 80-85amp at idle. :confused: But since it sounds so cheap and easy might do it anyway):h

Any opinions???

As I've mentioned before, I high idle nearly any time I'm idling. Wet stacking isn't an issue at high idle, and fuel consumption at a "dead" idle vs. a high idle is negligible. Over the road professional drivers generally high idle any time they are idling for more than a minute or two.

I see nothing harmful about high idling, even in a warmer climate.

I installed mine yesterday... ...first time the wife never came out into the garage to ask what was taking so long. Very easy to do. Thanks to Mittie Dragosljvich for the instructions on Kennedy's site, Eric for a great kit for a clean install, and everyone here for tips and encouragement.

Does this work the same way on a ZF equipped truck? I would prefer not to add a switch, but use the green/white brake wire for the 12v. So I'll ask my question again, does a high idle circuit on a ZF function the same as an auto???

Thanks,

MaxRockI am in the same boat as MaxRock, anybody???

No it won't work on a ZF. What you could do is wire a relay up to your park brake switch. This will only allow the high idle when the park brake is set. Either that or use a simple on/off switch.

Max Power, so the the point is to provide 12V from a source that will only be hot in a situation where you would want to use high idle, correct?

I already have it, with the PTO rotary switch etc. on my '03
The mention of remote starter got my interest, could I put in a remote starter AND have it go to high idle while I'm (say, still in the shower ?)
Would I just set the PTO rotary the night before ?

What is the purpose of the high-idle upgrade? It seems like this is more benificial for colder climes (I live in Houston).

Thanks, Brian.

Another cool Mod for little or no cost. Thanks guys for your help. This is why this Place Rocks!

Just added this before our latest bout of Freezing rain. Worked great hooked up to the brake switch. Thanks to all for the information about the upgrade - worked perfect!

I can see the high idle working great in the warmer climates to help the A/C work better. More air across the condenser should result in cooler A/C.

I Use Mine Any Time Its Idling. A Must For Colder Climates

Any answer to the auto start question? I installed high idle other day.

Max Power, I have the Astro Start you recommended. How do I tap into this so that It runs when I hit auto start?

Thanks for info!

I must be missing something majorly obvious here - I have noticed a dozen threads about the "high idle mod" (but confess I haven't taken the time to read through all of them) but I thought the factory manual says this is something that's built in and comes on automagically below like 32 degress? And I'm pretty sure that the other day when I was idling and my truck sounded like a jet, it was running at high RPMs.

So what exactly is the mod that everyone is talking about? WHat's it for and what's it do?

It is a MOD on LB7s
THIS is an LB7 thread.
Gottit ?

damnit - I knew it'd be something obvious. i don't normally pay attention to which forum I'm on - can you tell? ;) don't i feel like the newb.

damnit - I knew it'd be something obvious. i don't normally pay attention to which forum I'm on - can you tell? ;) don't i feel like the newb.
It must be hard to know which forum to go to, with all that "SCHTUFF" on yer truck ? -:t

Any answer to the auto start question? I installed high idle other day.

Max Power, I have the Astro Start you recommended. How do I tap into this so that It runs when I hit auto start?

Thanks for info!First I recommend hooking the high idle wire to the brake switch green/white instead of an on/off switch.

Then you need a relay.

Terminal 85 to white output on 04 connector on remote start (Trunk by default)
Terminal 86 goes to +12v
Terminal 87 goes to +12v
Terminal 30 goes to the blue wire under the steering column that tests +12v when you press set on the cruise control. Then you press the trunk button on the remotes starter twice and it will bump up the idle.

I've had my high idle for about 4 months now and it works great. Two things I've noticed that were not talked about on the instructions for Kennedy's site.

1) I have to push the set button twice the first time I set the high idle, after I've started the truck. So, if I don't shut the truck off, I only press the set button one time to start the high idle.
2)The first time I go to start the high idle I must press set twice but the first press of the button the engine gives a little snort, about a spilt second raise in rpm, maybe 25 rpm. It's hard to tell because it happens so fast.
Anyone else notice this?

aprr454 - My '02 does the snort also.

Yep.....thats just the bull wanting to be let loose before everything warms up. Damn impatient beastie!! :ro)

Tom http://dieselplace.com/forum/attachment.php?attachmentid=107

I hope to do a super simple shortcut high idle Tech Tip soon. A pin, 24" of wire, a fuse tap and a female spade terminal...

finally completed the high idle yesterday:D couple of minor hangups during install, but overall went ok. thanks kennedy for the tech tip!!:ro)

i also noticed the bull snort...sounds mean coming out that 4" exhaust, wonder what it's like coming out a 5 incher...:eek:

When is the green/white wire hot and how do you shut off the high idle?

I hope to do a super simple shortcut high idle Tech Tip soon. A pin, 24" of wire, a fuse tap and a female spade terminal...
John,

NOW you say that......if you only said that 2 months ago....


Tom

I've been wiring them up under the underhood fuse box. Simpler then going under the dash. I am not a big fan of fuse taps. Personally I would never use one. To each their own.

hey i think im gonna hook my high idle to the green/white wire on the brake. its gonna make using my remote start to turn on my high idle much easier. but just one thing had me wondering. does it make a diffference if there is a 12v signal going to the PTO pin on the ecm... i got this message off of Kennedys install "!!!!REMEMBER TO TURN OFF THE HIGH IDLE SWITCH BEFORE DRIVING THE VEHICLE SINCE POOR DRIVABILITY CAN RESULT. THIS IS DESCRIBED AS POOR ACCELERATION OR ‘MISSING’ ON ACCELERATION ABOVE ~2200 RPM!!!!"
i know u hafta set the cruise for it to worj but does that staement apply if the a 12v source goin to it without the cruise set???

If I forget to turn off the switch even with the cruise off, mine cuts out at about 1900 rpm. Reach down and flip switch and all is good.

Ryan, that wire at the brake switch tests +12v only when the truck is in park. So when the truck is in gear there is no power on that wire and it is the same as shutting off a switch.

awesome, i was just curious about that. i went ahead and hooked it up but havent got to drive it yet. i have the doorlocks and everything workin right not. ITS ALL BACK TOGETHER TOO!!

I've been wiring them up under the underhood fuse box. Simpler then going under the dash. I am not a big fan of fuse taps. Personally I would never use one. To each their own.Max, I've got a 6spd. Do you know if the e-brake wire exists under the hood as well? If possible I would like to wire it all up under the hood without going through the firewall.

No it won't be under the hood.

If I forget to turn off the switch even with the cruise off, mine cuts out at about 1900 rpm. Reach down and flip switch and all is good.
Me too!

No it won't be under the hood.you have no idea how much I hate poking holes in things! Guess I have no choice..
Thanks Max!

you have no idea how much I hate poking holes in things! Guess I have no choice..
Thanks Max!
on the drivers side of your firewall is where your hood release cable comes through. it is just a single cable coming through a grommet. if you pull this little grommet out of the firewall you can take a small screw driver and stretch you an opening between the inside hole of the grommet and the cable. and you should be able to shoot you a little wire through there. and stick the grommet back in and youre ready to go.

on the drivers side of your firewall is where your hood release cable comes through. it is just a single cable coming through a grommet. if you pull this little grommet out of the firewall you can take a small screw driver and stretch you an opening between the inside hole of the grommet and the cable. and you should be able to shoot you a little wire through there. and stick the grommet back in and youre ready to go.Thanks man!! that will work great!!!:ro)

I am assuming that a "Juice" has no effect on any of this...correct?

i have a 02 and i want to put in a high idle

anyone have a list of parts or know where to get them.

2002 chev 2500hd cc sb ls ( not so warm )


2001 ford f250 xlt 7.3 ( it stays really warm )

Hey guys!

Just did my High Idle mod last night. Took about an hour and a half and 2 beershttp://dieselplace.com/forum/images/smilies/beerchug.gif (http://dieselplace.com/forum/misc.php?do=getsmilies&wysiwyg=1&forumid=7#). Used the green/white wire on the brake switch instead of the toggle switch. The hardest part IMO was getting the plastic cover off the ECM connector.

My reason for doing it is not neccessarily for warming up but for keeping cool. I keep my truck idling a lot in the summer when I have to wait on the kids at school, run into the store, etc. My A/C just is not that efficient at idle when its 100 degrees and 90% humidity outside. The extra airflow through the condensor @ 1200 RPMs should help significantly.

Thanks to all who have shared their knowledge, experiences, pics, etc. with this Mod.http://dieselplace.com/forum/images/smilies/clap.gif (http://dieselplace.com/forum/misc.php?do=getsmilies&wysiwyg=1&forumid=7#)


Gary

I read through this thread tonight and am interested in setting this up for myself. A couple questions, a few people mentioned instructions on Kennedy's website (I am guess this is a forum member?) could someone post the site so I can take a peak :) . What all do I need to pick up to do this? Thanks in advance for any replies! I appreciate it!

http://www.kennedydiesel.com/

an easy way in the future is look under member list at the top of the page.
click his name.

Than you!

Ryan, that wire at the brake switch tests +12v only when the truck is in park. So when the truck is in gear there is no power on that wire and it is the same as shutting off a switch.
Would this be the same on the 04.5?:)