when i start up after the truck has been sitting all night when its cold, it revs high (about 1500) and idles at that until it warms up, then it'll go back down to normal. it didn't do this until after i installed my headers (3.0). any takes on what could be causing this?

 

You fixed it. Congrats



Sounds like normal operation. You sure it didnt do that before?

Jay

 

mine does that, then when its all warmed up it goes down to about 700 i think, i cant remember.

 

yea, mine idles high and then goes to normal after about a minute

 

Yeah, mine does that too on the cold mornings. I was concerned about putting it in gear at a high RPM like that before (still am kinda lol, oh well).
-Bryan

 

i don't remember it doing that before, but sounds like it's normal from what everybody else is saying. i just figured it might be a malfunctioning O2 sensor or something. oh well. thanks for the help.

 

Ya... when i start it up after sitting awhile it revs to bout 1500 to 2000 and stays that will until i put it in drive or reverse... but only after sitting awhile....

 

Yep, normal. I try not to take off until the idle goes back down.

 

i can just take off by letting off the clutch, i don't even touch the gas.