Rough iddle

[HubbyDk]

Hey , I have a 2004 ford fiesta with a 1.3 l engine, and it has a rough idle at normal operating temperature, when it's halfway through getting at normal temperature the engine runs fine and drives fine, no lack of power or whatever, but when it gets to operating temperature the idle gets rough and i think it's a little too low, it operates like it would be misfiring, i cleaned the throttle body which is a drive by wire type, the IAC valve, have relatively new spark plugs and wires, a new coil, i didn't see any vacuum leak (i tested it by removing hoses and the rpms went up), you have any idea why this would happen, and how to fix this?