2005 KIA PICANTO 1100.IDLING UNEVEN.REPLACED SPARK PLUGS AND AIR FILTER.STARTS EASILY AND RUNS OK.

SOURCE: 1993 Ford Tuarus Gl IN NEED OF HELP!

Well this could be in your timing. As cars get some miles on them the timing chain stretches therefore causing you car to lose alot of power.So you may want to have your timing set on this car. Also I had a taurus that had a bad torque converter, and it lost alot of power on hills and under loads, also when i gunned the gas pedal. so try the timing first. Hopefully you dont have a bad head gasket or a cracked head these symptoms you are describing are all signs of head gaskets or blown heads

SOURCE: Subaru stalls while driving, and idling

check the cam and crank position sensor making sure that there is no metallic deris

SOURCE: my 1996 Gmc K2500 with a 7.4l is miss firing. runs

Very good chance that it's bad fuel injectors and/or fuel pressure regulator. Very common with the 96-2000 L29 motor (Vortec 7.4L)
Replace with better injectors, the OEM ones are NOT WORTH cleaning. Go to http://www.fullsizechevy.com/forums/general-discussion/technical-maintenance/213662-96-99-454-vortec-owners.html
for more info...

SOURCE: Have an automatic transmission, 2001

It sounds to me like you have replaced everything except the most likely cause of your idle control problem...The Idle Air control. (IAC) (or Idle Speed Control Valve) It is located onthe throttle body and looks like the picture below.

SOURCE: Ford F150 engine backfiring, running/idling rough

I Have a 1999 ford f150 4.6 that back fires and is just running really ruff when idling alot of nack fire a sord of like a pulse going on what is my problem?