High idle mod options-pros/cons?

[jtk27]

Ok I've always read about the high idle mod so I decided to do it. Everything I had read said hook up the orange wire. Well I was doing a little research on how to wire upfitter switches up and stumbled across another site and this guy said to wire up the Purple/Light green wire instead of the Orange wire. First time I had read this. He said the orange wire was PTO and locked up torque converter as well as increased idle. He said the Purple/ light green left the tranny alone and varied idle according to different factors including battery charge rate. I used the purple/light green wire to switch #4 and it works great but I am curious as to pros and cons between orange(PTO) and purple/light green wire.

[mmccraney]

Originally Posted by jtk27

He said the Purple/ light green left the tranny alone and varied idle according to different factors including battery charge rate:

So basically, the more load on the charging system the higher the idle would be?

Subscribed to this thread, as this is one of my next mods

[jtk27]

That is the way I understood it. He said as high as 2400 but I haven't seen anywhere close to that.

[RRF985]

The BCP that you hooked up to (Purple/Lt. Green wire) will vary the RPMs up to 2400 based on the battery charge. I've heard that if you use your truck to jump start another vehicle with the BCP high-idle engaged it will rev up to 2400 as you try to jump start the other vehicle.

The SEIC high-idle (orange wire) will maintain 1200rpm constant and lock the torque converter and is used for the PTO if you are driving something off of that. That way there is less loss of power through the trans.

[jtk27]

So if you're not using the PTO is the purple/lt green wire the way to go?

[RRF985]

IMO, yes.

[Brute650i]

what rpm does it idle at when the batteries are seeing normal load/charge?

[jtk27]

seems to be in the 1200 to 1250 range

[lowrthnu92]

is this specific to 05-06's theres a thread a few down from this one saying for 03-04 is white w/blue strip to Light blue w/yellow stripe but it doesnt say whether its the PTO or voltage high idle

[amdriven2liv]

This topic is for the 05-and newer. Doesn't apply for earlier years.

03-04: High Idle Mod

05 and newer: TheDieselStop.Com - www.thedieselstop.com