Post your current tune as well as a log of idle only, after warm-up.

Well I kinda feel like a dummy now. I was disconnecting the tps sensor. Not sure if it's behavior is a problem. I'll chalk the iac when I get home.

Took the throttle body and iac valve off and they don't look too dirty. None the less I'll give it thorough cleaning. I turning the car on with the iac valve only electrically connected and could feel and hear it at least trying to do something.

put your idle valve back on.


the problem is your tune.



tune the car.

Well I did as you said. I put my iac and throttle body back on. And yep no change. I tried some different settings with the tune. One thing that seemed to help the most was fiddling with the timing map. Drove it for while and it seemed good...... Yeah not so much. I ended up noticing that when I let off the gas while cruising the kpa in tunerstudio doesn't follow what my boost gauge reads. It reads 18-20 in hg at idle and 26 in hg when letting of the throttle when cruising. I noticing when letting off the throttle while cruising the map pressure would stay around 55 - 60 kpa. When idling from cold but coolant has reached operating temps my kpa would be at a minimum of 35 kpa.

So after I noticed this I changed that required fuel for what the current idle kpa is now (55kpa) and it started to run well again. So I'm guessing I am getting a collapsed map pressure line. And it become more evident when hot because I guess the material the line is made of is more flexible.

And fyi I can get my car to idle very easily at a very steady 850 rpm and 13.5 afr. It's just when I start driving after about 20 or 30 minutes.

Well everyone problem has been fixed. I just had to run a new line for the map sensor. The line got squished. I just have to tweak the cranking pw and afterstart enrichment. Thank you everyone for the help.

Good job posting the solution.