Please check the video.
The idle issue is that it goes up and down then finally sets to idle at 900rpm lets say

https://www.facebook.com/video/video...=2922946109525

 

it varies from 750 to 1200 id say two or three times then sets to the proper idle

when i go neutral from any gears and when i stop too..really sucks

 

looking at the cluster you have many problems.... have you checked tps sensor ans spark plugs?

 

TPS , accelerator pedal sensor, vacuum leak, dirty throttle body will all cause idle hunting.
No way to tell from here. Check codes first then move on from there.

 

Are you using hpt?

 

not yet.. was tuned with trifecta..

But im trying to learn somehow about tuning on hptuners forum..
i might just order the program from them

 

i had p0121 a while back erased it
i think throttle positioning sensor..

 

how do i check tps sensor..spark plugs are good i guess i have two step colder ngk they say not to gap it because its sensitive..

 

Look at your tire pressures and see what one isnt working.

I would clean the TB to help with the idle. I dont recommend moving the butterfly valve by hand when cleaning

 

was this a problem before the spark 2 step colder plugs?

sometimes you can check the tps sensor by disconnecting it .. if it doesnt cause anything... then its bad

go to chevy dealer and have them clean your TB... over time they get too dirty....

 

by tps i meant Throttle position sensor... not tire pressure sensor lol

 

guys my tpms are not installed i have my winter tires and the traction control i isually take it off thats why these two lights were on.

The idle issue was since i went supercharged last summer so it must be something related to it probably the tune..

 

Does it happen more when the car is not warmed up? Does it happen more when the car is under a load at idle(a/c,lights)?

I have been trying to figure it out myself...I have a similar problem, but it happens to me maybe 1 in 10, not every time. It started happening since my build...I think the reason is the lighter flywheel. It spins down pretty fast and undershoots the idle, then recovers like yours. I will let you know what I come up with. I have a good idea where to start...just give me a few days. It is likely tune related

 

No the idle thing is everytime even with ac on or off. Its been since the build but regarding the p0121 any idea about it..