98 intrepid es 3.2 v6 idle air control valve ????
I need some assistance with diagnosing this problem im not sure if the idle air control valve is going bad or if i have a vacuum leak. whats going on is upon start up its idles at 1000rpms like normal and then starts to drop and bounces at 600 rmp and 400rmp . and usually will die... but it will fire up first try every time after shutting off and it seams to get worse the hotter the car gets .like today i was leaving the house and i drove to the end of the street and have to stop at the stop sign and it died . started back up and was on my way. and then it was fine till i have to stop and my rpms drop .i am able to save it most of the time by patting the gas before it dies .it shut off a couple of times before i got home throughout my hours of driving around. im unshure that its a vaccume line cuz when i got home i left it running and un did one of the vaccume lines from the intake and it idled pefectly. but please any ideas or help will be greatly appreciated.
a little about the history of the car
the car runs great and it has some balls for what it is tho . i got it two years ago and id didn't run cuz it st for 3 years but after a fuel pump and a new battery it fired right up. since then i have had to replace the whole cooling system :radiator,water-pump, upper and lower hoses, coolant temp sensor, i change the oil reg and plugs are fine. the car has 148000 in the car but it has a rebuilt motor with 39000 . but happened before i got the car