Alright, got my high idle partly installed today. I installed the pin into the plug and i decided i wanted to check its operation before i permemantly wired it in. So I had a friend hold the wire on the battery to test it. As soon as the wire got power, the idle surged up to about 850 RPM, this is before i did anything with the cruise. Then putting the cruise to on and pressing set twice idled it up to about 1350 RPM and pressing resume raised it to about 1800 or 1900 RPM.

Why did the idle surge up to 850 RPM when i just gave it power? Would it act different when its wired up the brake switch? I dont want the truck to idle at 850 all the time. Plus i thought others said that theirs would idle at 1150 or 1200 when pressing set, not 1350

Also, my truck is the ZF-6 and I used a muitimeter to test which wire on the brake switch only had power when the parking brake was on. I couldnt find one that only had power when the parking brake was on. Which wire would only have power while the parking brake is on?

Anyone have any ideas?

The 1350 RPM "low" high idle setting sounds correct to me when using this method. This is what speed mine idles at. As for the other issues, I'm not quite sure what to tell you. I never checked mine before wiring it to the brake, so I have no idea why your normal "dead" idle would raise to 850 RPM.

Max Power, can you chime in? (He's the mastermind of this whole project!)

2001's would idle up to about 850........then about 1250 and 1900 for the HI-IDLE.

Maybe the programming is similiar.

T:D NY

You can have the dealer change the pto speeds to anything you want. 1250 is where mine is. I still prefter the automatic high idle as it puts more load on the engine with the turbo and actually warms up the truck faster then the PTO high idle.

I agree Max Power, but I like to high idle my truck if it's going to idle more than 1 or 2 minutes to prevent wet stacking. The only time I "dead" idle mine is usually to cool it down after extended highway driving.

One more thing Max. I thought I remembered you saying that you needed to have the high idle wired to a switch in order to change the idle settings. Is this right?

I am not 100% certain. I think if you adjust the speeds it forces you to have a standby speed that is higher then normal idle. In which case yes it would be required. I haven't had a chance to play with a tech 2 to know for sure,

I am not 100% certain. I think if you adjust the speeds it forces you to have a standby speed that is higher then normal idle. In which case yes it would be required. I haven't had a chance to play with a tech 2 to know for sure,
Maybe that is what mine is set on or something. As soon as the wire gets power it goes to a standby idle of 850, hitting the brake drops it to the normal 680, parking brake does nothing. I guess ill just have to wire it to a switch. When i flip it ill get 850, set gives me 1350, and resume gets me 1800/1900. The only thing im worried about is does anyone think that 1350 is too high for a cold engine?

I was a little concerned about the 1350 setting on a cold engine as well, but the factory auto high idle will rev it to about 1200 rpm right off the bat, so I don't see it as a problem. If it isn't cold enough for my auto high idle to kick in, I let it dead idle for a couple minutes and then manually kick the 1350 setting on.