tdupuis

Today was the first cold morning of the winter, consequently the first cold morning that I've driven my truck. Overhead said 32 degrees out, which dropped to 30 by the time I got to school. At any rate, the windows were all frosted up so I started the truck and let it idle for a few minutes while I cleaned off the windows. After about a minute, I heard the idle go up. Checked the tach, sure enough it had raised to 1000 rpms from the standard 650/750 (I forget). When I was done scraping and drove off at the second stoplight it had dropped back down to normal. When I got to school, I parked it and let it idle while I got out my extension cord to plug in the block heater (since I spend too much time here for my own good). Sure enough, after another minute or so the idle jumped up to 1000 rpms again.

I thought the 6-speed trucks weren't supposed to have a fast idle feature, and that on the automatics it was engaged using the cruise control? I've never seen my truck do this before, but it seemed systematic and built-in to the truck's computer. Has anyone else experienced this on their trucks, and is there any documentation that says this is what's supposed to happen? Are there gremlins living in my truck that just hit the go pedal a little when I'm not looking?

spudman

yes six speeds have this feature right from the factory the idle control feature in the cruise control is a dealer activated option you can get on the truck. my truck jumps to 1k rpm all the time but we're always cold up here and i've specifically told the gremlins not to touch the pedals

rossn2

I high-idle feature on the automatic trans. is by pushing the cruise-control button in and it will hold at high idle. The HI on the six-speed is the temp sensor working in conjunction with the grid-heater, that's why the engine jumps up to 1k rpms and then automatically kicks off as warm air passes into the engine.
Not the same HI on 6spd that the Auto Trans trucks have....sorry.