Ford Ranger Rough Idle I need help!!!

[bg1421]

Hi, I have a 2002 Ford Ranger XLT v6 3.0. I have had a rough idling problem for 3 months now. I have changed the spark plugs and wires, changed the air filter, changed the fuel filter, changed the oil, cleaned the idle air control valve, i have flushed the coolant system and refilled it. I have used seafoam in the gas tank, oil (then changed it), and in the vacuum like. I have no codes, no check engine light. When my car is in park or I pull up to a red light, there is very rough idling that sometimes rocks the truck side to side. I feel like there is nothing left for me to do. Please someone help me??!!

 

[Tbars4]

...Do a title search on here for idle...

...It could be many things such as a MAF, IAC, but it sounds to me like a vacuum leak..