ok well my pacesetter headers are in and TSP Y pipe is on, just the Y pipe is longer than the stock one and need to cut the I pipe for it to fit. but anyways i replaced the spark plugs and she runs great just one problem, once i let her warm up and put it in park i shift out of park into drive and she feels like its gonna die, the RPMs drop to about 500-600 RPMs and then settles back up at 700-750 RPMs. now could it be a bad IAT sensor or throttle body is dirty??? i plugged all the spark plugs in good and O2 sensors and also deleted the EGR and AIR, i thought it was the EGR valve and now its out thats not the problem what could it be and also if it is the IAT sensor how much do they cost from the dealership??

 

It could be the IAC sensor.
Not sure on cost though.

Is it throwing any DTC's?

 

its throwing an EGR code but it was doing that before the install aswell and i thought it would be the EGR valve but isnt do you think if i reset the PCM it will help and how do i do that?? i want it to relearn its idling points possibly by doing that.

 

the IAT sensor i found on GMparts direct only costs 20 bucks so at the dealership should cost triple that lol.

 

You could try pulling the PCM fuse..

 

Have you done the idle learn procedure?
Anytime I've had the battery disconnected
for a while I have to do it to let the pcm
"relearn" the idle. I have especially had
to do it each time after a mod, ported TB,
TC, headers etc.

 

how do you do the idle learn procedure?????