High idle

[spdrcrj]

Has anyone experienced high idle in cooler weather? It's only in the 40's - 50's here and I've been experiencing a high idle. The truck also bucks at low rpm's when it's cold (this goes away after it warms up). When I blip the throttle, the idle comes down to normal so Im not sure if it's a tuning thing or a throttle issue. I have the mods listed below so not sure if they have anything to do with it or not.

Any ideas?

thanks,
Jim

 

[Black1]

It could be a IAC issue (Idle Air Control)... What RPM does it idle at? :dontknow:

Mine was replaced a few months ago because it idled too low, and stalled out...

 

[spdrcrj]

It could be a IAC issue (Idle Air Control)... What RPM does it idle at? :dontknow:

Mine was replaced a few months ago because it idled too low, and stalled out...

It idles around 1400-1600. Again, it'll come down to normal (750rpms) when I blip the throttle. Not sure if that has anything to do with it.

 

[Black1]

It idles around 1400-1600. Again, it'll come down to normal (750rpms) when I blip the throttle. Not sure if that has anything to do with it.

That is pretty HIGH! :dontknow: I would take it in and have them run a diagnostic, or two....

 

[Bone]

Any codes thrown?

 

[TheMoparConnection]

check our throttle cable... you say if you tap your throttle it comes down? only in cold weather? almost sounds like your cable its sticking

 

[FaSt ReD SrT10]

Mine does the same thing here when its cold and I hate it! Again yes, all I do is blip the throttle and it returns back... but its really pissing me off when I go to shift an what not and the rpms stay up...

 

[Big Perm]

Thought this was normal :dontknow:

Think I've had a few vehicles that idled just a bit quicker when it was cold, but could have sworn I had been told it was programmed that way....you could just hit the gas and it would reset, but they did that to help it get to operating temp.....

Or maybe I just dunno what I'm talking about :dontknow:

 

[Black1]

Thought this was normal :dontknow:

Think I've had a few vehicles that idled just a bit quicker when it was cold, but could have sworn I had been told it was programmed that way....you could just hit the gas and it would reset, but they did that to help it get to operating temp.....

Or maybe I just dunno what I'm talking about :dontknow:

Yeah, high idle is a normal function when its cold (below 38degs mostly).... But when it's 55 degrees outside? :dontknow: And 1600 RPM??? :dontknow: Sounds fishy to me. :dontknow:

 

[spdrcrj]

Ok...installed my catless mids and paid close attention to the rpm's. The truck is sticking at 1000-1300 rpms. Sounds like it may be normal. I just figured that once the truck warmed up, it would go away. I thought about the throttle cable too but any movement at all in the accelerator pedal moves the cable and throttlebody valve.

 

[John Stuttle]

I had this problem once and it ended up being a bad TPS - john

 

[Marc T]

There has been several posts about RPM's taking time to drop to normal. I know if I let off the gas with the clutch in I takes a while for the rpms to get down to norm!!:dontknow:

But then again I usually let off the gas with it in gear so I get that wonderful popping noise!!:rock:

 

[spdrcrj]

I had this problem once and it ended up being a bad TPS - john

Trucks not thowing any codes, would a bad TPS show up when I look for codes?

 

[John Stuttle]

Trucks not thowing any codes, would a bad TPS show up when I look for codes?

Mine kept doing this with no codes. Finally threw a TPS code. I swapped for a new TPS and it has solved the problem. A TPS is less than $30 so it may be worth a try, but don't blame me...............(lol) -john

 

[spdrcrj]

LOL....I appreciate your help John. I'll keep tabs on my codes and see what happens.

 

[lbstone]

I have a similar issue with high idle but it happens in all weather after driving her hard for a few seconds (or minutes) the truck idles just under 1k for about 5 - 10 seconds before returning to normal (about 700) all by itself without any throttle input. I've been meaning to post a question about it. For mods my truck has only a Magnaflow Catback and a K & N intake. I was curious if the truck maybe had an aftermarket tune in the PCM that is causing this. I purchased the truck used with 14K miles on it. Any ideas??