idles up and down
hello guys, what causes idle to fluctuate up and down when first started ,then it evens out after about 5 minutes.runs fine while your driving,but when you come to a stop and sitting there it does it again.at night you can see your headlights on the car in front of you getting dim then bright as you sit there at a stop. new maf,plugs wires,temperature sensor, checked vacum hoses,cleaned iac still does this. its a 94 3.0 with only 101,000 miles any ideas??