well the problem is , fuel pump was replaced, car fired right up without gas pedal assitance. ran great for 15 seconds or so, then died, figured ok restart it and give it light throttle to keep it running, seemed to make it worse. Pressure on the gas peddle made it stutter then die. No CEL at all during this stuff, either. From the first time it fired, to now, it hasnt throw a CEL at us, and its starting to annoy us. We got another IAC and havent put it on yet, the old IAC is still on the car. We figured the car has 140k on it, just replace all visible vacuum lines, rubber ones, since that is very inexpensive and see what that does.It doesnt add up, First time car s together, firesd up runs as smooth as can be, then it got to operating temperature, drove it around the block 2 times, idle went bad, rough idle, clattering noise, would stall occassionally. Then we narrowed it down to IAC since it has almost every sensor replaced on the engine, new IAC on, wouldnt idle anymore, would run when you put the throttle down alittle bit. But far as idling it wouldnt, so we turned to the fuel pump, we were right there, was getting crap for pressure. Replaced it, car fired up without pedal assistance, and ran for 15 seconds or so, and just died, started it up again, this time put slight pressure on gas pedal to keep it from dying, didnt work. Sounds like to us its a vacuum leak or hate to say it, cracked head????? Didnt decide to show its ugly face till the engine got to operating temp. Dont know but Ive not read alot of problems with these heads cracking or am I just that blind? lol Thats where the car sits now, Cranks, starts but wont idle nor can you give it gas to keep it running. ANy other suggestions, besides putting it in the pasture and shooting it. Im out of ideas.