Why won't it idle up?

[Eric]

Okay, after doing some reading, I just noticed about a month ago that my truck hasn't been idling itself up when it's cold. Some people say that the parking brake has to be set (my truck's an auto) but I've never set the parking brake before and it used to idle up. I've tried setting the parking brake but that did no good. Then I noticed that the parking brake light on the dash wasn't working. So a couple days ago, I beat on the dash and got the light to start working again. Tonight, I started my truck and let it run for 20 minutes with the parking brake on and the light was working. It's about 15 degrees here right now and it still didn't idle up. Anyone have any idea what's wrong?

*Edit* I even turned my Dp tuner back on the stock setting, thinking that maybe my other settings might have the high idle turned off

[bigwhite7.3stroker]

dang thats weird mine still idles up with my DP

heres anever heard of what causes it not to work

[Eric]

Originally Posted by bigwhite7.3stroker

dang thats weird mine still idles up with my DP

heres anever heard of what causes it not to work

It's got me stumped. Like I said, I've never set my parking brake before and it used to do it

[Jake]

Well, it bases high idle on the air temp sensor and oil temp sensor, maybe one of those 2 are bad.

[Eric]

Originally Posted by cob32187

Well, it bases high idle on the air temp sensor and oil temp sensor, maybe one of those 2 are bad.

How would one go about checking those?

[bigwhite7.3stroker]

Originally Posted by cob32187

Well, it bases high idle on the air temp sensor and oil temp sensor, maybe one of those 2 are bad.

hmmm... that makes sense sounds like this should be a pretty easy fix

whitelongbed I never set my parking brake either and mine always works

[Jake]

Originally Posted by whitelongbed

How would one go about checking those?

I don't know. Ask it if it's feelin ok?




I don't know for sure, but probably a good scanner would pick it up if it aint readin right. Especially one of the hi tech ones that shows exactly the voltage that each sensor is reading, then compare that voltage to the actual temp.

[jamstoyz]

it wont do it if your truck is already warm. have you been plugging it in? mine dont idle high when its been plugged in or when its already warm.

[Eric]

Originally Posted by cob32187

I don't know. Ask it if it's feelin ok?

BRB........

I guess I'll have to try and get it scanned. It's not a big deal, just one of those things that makes me wonder

[Eric]

Originally Posted by jamstoyz

it wont do it if your truck is already warm. have you been plugging it in? mine dont idle high when its been plugged in or when its already warm.

It's been sitting since Monday afternoon, not plugged in.