Trouble keeping idle after starting car

[SK240SX]

I need help bad, this is driving me nuts.

here's a brief background.i just recently had my car serviced at a Nissan Service Center after my car kept stalling when coming to a stop. thanks to this forum, i was right in suggesting the problem was in the IACV, they replaced the entire IACV and the wiring harness for it because they said the new IACV's have different connectors. that solved the stalling problem. then another issue came up, when the engine is at operating temp. my idle was at 500-550 rpm and when i come to a sudden stop the engine still stalls, so i brought it back to them and suggested to fix the idling which they did and it's not at 700-750 rpm. i guess they just plunked in the new IACV and didn't bother adjusting the idling on it.

anyway, HERE IS MY PROBLEM: when the engine is warm (normal op temp) and after driving for about 15 - 30 minutes, and i stop and turn the engine off, then i try to start the engine after about 5 minutes, it starts then the RPM dips and stalls, all in less than a couple of seconds after starting. when i start the car and give it a few gas for a few seconds it starts to hold the idle at 750 rpm.

and HERE IS MY QUESTION: what the hell is wrong with it? i'm leaning towards sensors but i don't know which. i'm also planning to change my spark plugs to Iridiums and NGK wires. - what could be causing it to stall when warm? - how do you solve it?- any suggestions on where to start first?

sorry for the long read but i wanted to be as detailed as possible so you guys can better assist me and for the benefit of other members with the same problem.

oh, and my car is a 92 240SX KA24DE

thanks in advance!

[Florida240sx]

Try replacing the CTS. And possibly 02 sensor. CTS can be iffy, 02 well it doesn't hurt but they last a while. First I would go CTS and keep your old one if it doesn't fix it. Let me know.

[Florida240sx]

zerothread?id=152467

[SK240SX]

thanks for the quick reply. i will try replacing it...

i was asking for the location of the sensor, i found it.

thanks again.
Modified by SK240SX at 11:38 AM 9/21/2007