Jumpy idle when IAT is plugged in?

[DanGTP]

You may have a wire shorted on the return signal from the IAT, so when it's not plugged in, there's no short. Check the wires for the MAF, TPS, and IAC valve. Also, try placing a 10k resistor across the pins for the plug to the IAT and see if you get the same result.

[BillBoost37]

The IAT has a little to do with idle. It supplies the correct air temp to the PCM for it use in conjuction with the ECT in order to determine the idle speed, amount of fuel etc etc.

When unplugged your IAT temp should read abotu -40F as a default the car runs rich.

Do you have a method to read the sensor? Aeroforce, scan tool etc?

[ninnyGTP]

I have an code scanner, the problem is I loaned it out and haven't heard from the guy in a few days. I know the IAT doesn't effect the idle, which is why it's throwing me off.

Here's a video to show i'm not crazy haha

http://s909.photobucket.com/albums/a...2-11-56-57.flv