High idle on cold start

[808islerunner]

When I first start my truck in the morning, or anytime when the motor is cold, the idle stays at about 1300-1200rpm and gradually goes down within a 3-4min. to its normal idle which is about 600rpm. I have no CEL but I was told to replace the coolant temp sensor first before heading to the idle solenoid. Any suggestions would be very helpful, Thanks!

 

[soupkitchen]

check for vacuum leaks. I had this issue with my wife's and one of the hoses coming off the front left firewall was cracked...may give it a look around?

 

[threadlessclimber]

I think that's normal...

 

[higgy]

normal

 

[zoombyu86]

It's how your truck reaches closed loop faster.

 

[ThorInc]

What I can add, low idle for me is around 700 rpm.

 

[wc11]

18 year later mine still does it.
Totally normal. You'll find on the coldest winter days, it'll be even longer til the rpm drops.

 

[JayRolla]

Every car in the world does this.