Really rough idle

[Mdrosejr]

I have 2003 jeep wrangler 2.4 l and when I start the jeep it idles really rough it kicks and bucks for about 10 minutes I've changed the plugs and wires cleaned the throttle body and sensors. I was told it was probably a vac leak but I haven't found anything.

 

[Knicy6tj]

Try cleaning the IAC. And check wiring

 

[Mdrosejr]

Try cleaning the IAC. And check wiring

Where is the IAC located?

 

[JPNinPA]

Is it high idle or low and rough like stalling? Does it continue when you step on the gas?If it only lasta 10 min or until at temp it could be a leak around the TB or intake to head area.

To find a leak, carefully take some carb cleaner and slowly spray smal squirts arounf the TB, then near each cylinder intake connection. You will hear the idle change when you hit the leak.

The IAC is part of the TB. It controls the air flow during idle. You could pull it out of the TB and spray it down with carb cleaner. do not damage teh plunger. Be sure the connectors are clean and tight when you reinstall it.