The IAT sensor is part of the MAF sensor, both are plugged in and both are new. Today I bought a new IAC valve and installed it. Now the car runs even worse. The engine will start and then stall, start and stall. I started it quite a few times and tried to get it to idle. After the engine got to normal operating temp. it started to get better, I assume due to the relearn of the PCM. Feathered the gas and got it in Drive without stalling. I took it out for a twenty minute test drive and almost got stranded after the fifth or sixth time it stalled. I thought it was running better until I got home...pulled into the driveway and it stalled. Started it again and stalled. Any thoughts?? Do I need to drive it some more for the PCM to relearn. Seems like an aweful long time for a computer to relearn.
