01 Impala 3.4L Idle issues

Hello i'm the lucky owner of a 2001 Impala 3.4L

I'm having issues with idle some days its fine others it revs a little high (it will cruise at 40mph w/o gas pressure) Some days it screams. some days its normal.

Here is what i done

I unplugged IAC when car was running normal and it will run normal all day long with it unplugged. If I plug it in and drive for a while it acts up. So I replaced IAC and cleaned IAC ports with q-tips and TB cleaner. It no longer screams like it use to some mornings. But still have issue with it driving the idle will creep up to where i have to ride the break in town.

Now here is what i noticed as soon as i unplug TP sensor it stops high idling.

Do you think this could be a faulty TP or is there somthing els that controls the idle

A bad tps can cause this but without a proper scan it would be guess work.

Any applicable codes? You may need to take the throttle-body off and clean it, all passages. The pcm uses the map sensor to determine if tps signal is in range.

Any applicable codes? You may need to take the throttle-body off and clean it, all passages. The pcm uses the map sensor to determine if tps signal is in range.

No there is no codes being thrown. Unfortunatly I do not have a scanner to read tps only hand held code grabber. I bought a TP sensor it was cheap enough I'll try that if it dosen't work then I will take your advice and remove and clean TB.

Thanks a mill for both your guys help

You could use a digital multimeter on the tps signal wire, key on, move throttle up and down, see if voltage signal moves up and down smoothly?