Hi Gang, I replaced the idle control valve, repaired a small crack in the plinum and checked the hoses, but I am still having the same problem.
When the engine is cold, 2003 4.2L V-6 5 speed manual trans, and I turn the key it will jump right up to an idle of between 2000 - 2500 rpm, it will begin to drop down within about 15 seconds to about 1500 - 1700 rpm, when it is warm it idles normally at about 850 rpm, but while warm if I come to a stoplight the idle drops down gradually from about 1200 rpm to the 850, it drops down faster if I push the clutch pedal in. The check engine light is on but the truck runs good and gets good gas mileage, I have also replaced the o2 sensors on both manifolds. Don't really want to go to a shop......any clues??.....Thanks.....Tom