what is the best way to approach the high idle install on our trucks, does anyone have the wiring for pcm. and do u need those special connecters as metioned?(Crimp one or two (depending on number of speeds desired) 18 ga. wire(s) to a terminal pin (p/n12089649) using a Packard Electric crimp tool (p/n 6285847). or can u just splice into the proper wire.

any helpfule ideas and tips? is it hard to remove the glove box?

www.kennedydiesel.com look for high idle control for 6.5 under tech tips.

You can get by without using the special connectors. I did.

Canadian Rigger has the best step by step instructions I have seen. This is the link.

http://www.65td.com/forum/forum_posts.asp?TID=16&PN=1&TPN=1

I agree with dmitch, I followed CR's instructions and they were great. Works like a charm. I bought the special terminal pin 12089649 but just crimped it carefully with needle-nose pliers.

*note* my high idle does NOT go back to normal when the brakes are tapped, nor when it is put in gear! Even in drive going down the road I can flip the switch on and have an 1100 rpm cruise control.

I couldn't find the pin locally so I went to a scrap yard and cut out a GM Plug then removed what I wanted. I cut the wire from the used pin about six inches long and soldered my switch wire to that. Long way around but sometimes you just have to make do.

Canadian Rigger has the best step by step instructions I have seen. This is the link.

http://www.65td.com/forum/forum_posts.asp?TID=16&PN=1&TPN=1

Will those instructions work on OBD II though?

I cut a terminal out of a power box for a home computer, it doesn't fit perfect but it is close and it works.

That's a good point you raise chris. Maybe someone could chime in on that.

Will those instructions work on OBD II though?

http://www.kennedydiesel.com/ has slightly different directions for the OBDII trucks.

ahhh, but OBDII trucks will kick out if you tap the brakes... I think at least, my idle controller (seperate doo-dad) will knock out high idle with brakes.

Can the batteries remain connected while taking the plug off the PCM?

im gonna atempt the install if i can find that connecter but i don't know where elese to go?

Can the batteries remain connected while taking the plug off the PCM?

Officially, No. We do it here at work all the time but it's on the companies dime and we are trying to save time. On my own stuff, I would disconnect the batteries.

I just did 2 trucks a 97(customer's) and a 98 (mine), both of mine required a GROUND to work not a positive like CR's .Good that someone noticed that, I'd hate to see what would happen if someone hooks up a power source to a pin that was susposed to be a ground. I guess you have to pay attention that you have an OBD1 or OBDII system.
BTW I did mine without disconnecting my batterys. and I had an old GM harness that I got the pins from (silimar pins on connector that bolt into Gas Veh computer)

I just got my high idle working in my 98 odbII and snafu'd at first by giving power to switch without luck, figured switch was screwed, checked with trouble light and thats how i learned it needs a ground, i went to gm for my 2 conectors, they changed the p/n# on the pin, tring to find the invoice with the new number for ya'll, once in gear the high idle wont work on my truck(like a cruise function). No codes since i hit the ecm with a hot source thankfully

Your OBDII may come prewired for Hi idle mine did, 2 loose wires coming out of the PMD middle connector IIRC touch to gnd and you get hi-idle

Your OBDII may come prewired for Hi idle mine did, 2 loose wires coming out of the PMD middle connector IIRC touch to gnd and you get hi-idle
Got a pic?

*note* my high idle does NOT go back to normal when the brakes are tapped, nor when it is put in gear! Even in drive going down the road I can flip the switch on and have an 1100 rpm cruise control.

I hope my will work like that as well... This way when I'm driving around the deer lease in 4hi or 4lo I can flip the switch for high idle and just cruise nice and slow:ro)

Sorry guy's, i've updated my instructions so no one gets confused between OBDI & OBDII anymore. I was not thinking that a lot of guys don't know the difference between the two or which one they even have by simply posting the year of the truck. Hope the hot wire didn't do any damage if hooked up to OBDII.

Dumb question but what is the need for a high idle? to warm up the truck faster?

Got a pic?

somewhere in archives wasa pic I posted long ago, in middle of another project will get a new pic if you want to wait

Dumb question but what is the need for a high idle? to warm up the truck faster?

yea warm faster, PTO, or help run a winch better.

For me the hi-idle is required as my truck is my office, don't wanna sit just slobbering away all day in the winter to keep me warm or in the summer to keep me cool. Also keeps me charged up with my computer running, phone running, 12v - 110 inverter running all day. But ya, i think it was more intended to be used if you had a PTO running.

Does running the high idle for long periods affect fuel consumption? Or is it so little of a difference that you can't notice?

i just installed mine so i cant quote personally on it but some of the boys at work had high idle and over 8-10hours it would eat about 1/8-1/4 more of a tank

Well i use my hi idle every day, truck runs pretty constant for 10 hrs +, with the odd shut down for 10 - 15 minutes once or twice a day. It'll burn 1/4 tank during that time no problem, maybe more.

what setting ? 1100 or 1500 rpm?

Well i use my hi idle every day, truck runs pretty constant for 10 hrs +, with the odd shut down for 10 - 15 minutes once or twice a day. It'll burn 1/4 tank during that time no problem, maybe more.


:eek: :eek: :eek: :eek: DAM:eek: :eek: :eek: :eek:

1100 rpm, i've only had it on my 94 & 95. I'll be putting one on the 00 when i get it back.

00 seemed to go through more fuel than the 94 on hi idle as i use the scanner software to put it on hi idle but thats a PITA. I spend about 150.00 every 3 days on fuel.

I just got thru installing the fast idle on my 94 an hour ago. Thanks to CR's pics I had zero problems and it works perfectly. That is way cool.:cool2:

I just got thru installing the fast idle on my 94 an hour ago. Thanks to CR's pics I had zero problems and it works perfectly. That is way cool.:cool2:

dwayne,
you beat me to it.... I just finished myself took about 30-45 min max. It's the best MOD to date for $1.02 (cost of ECM pin):ro) .
BTW It won't turn off once you hit the brake or put it in gear which I'm glad it don't:D. Thank you very much CR!!!!!!!!!!!

Yeah I got the 5-speed and prefer to be able to let the fast idle run while lumberin in low gear out in the fields. Of course, how hard is it to just reach up and flip off the switch?...LMAO!!!!!!....am sure I would be the first to forget.....I have an extra pin for the ECM if anyone needs one. I bought two just in case I messed up my first one.

prefer to be able to let the fast idle run while lumberin in low gear out in the fields

:exactly: what I want to do

You guys were lucky, all of the local dealers made me buy a pack of 10 to get them. Oh well, I get wholesale so it was less than $5 for 10.

Dumb question but what is the need for a high idle? to warm up the truck faster?
we have high idle switches and hand throttles on trucks and APC's at work, and my understanding for them was that a diesel engine isn't meant to be left ideling for long periods at low rpm's, the high idle is used to prevent glazeing of the cylinder walls

...and I think it keeps the oil pressure up higher if that makes a difference