I searched everywhere and I couldnt quite find the issue Im having on here. After the car warms up and I come to a stop it will idle VERY hard and almost stall out. It will fluctuate between 300-1k rpms. It doesnt do it all the time however it always does it after I have been driving the car for a while. In addition the other day when I was WOT in 5th ( 5 speed ) at around 5-6k rpms there was a loud pop ( sounded distinctly similar to a charge pipe blowing off but not as loud ) and the CEL turned on. I checked the dtcs with evoscan and got these:

P0234 Engine Overboost Condition
P0113 Intake Air Temperature Circuit High Input
P2228

Ive never had these issues before,they just kind of sprung up recently. I did a boost leak check today and couldnt find any leaks in the piping except I think the throttle body may have one. When I pressurized the system to around 21 psi it leaked the air relatively quickly ( it probly took around 1.5 mins to get down to 5 psi ), then at 5 psi it started leaking very slowly until it leaked out all the way. The cams were TDC when I did the test as well.

I have an 06 IX, and Im stumped. I dont know what culprits are at hand considering it happened so suddenly. Thanks in advance for anyones help

 

does your boost taper or drop off at WOT? Loud pop is not good... Check to make sure that vac hose on the TB didnt pop off

 

Do you have a boost gauge? Does the car feel sluggish when boosting?

Definitely check all the vacuum lines and maybe even pull off your intake and check the compressor wheel.

 

At wot it normally goes to around 21 psi then drops to around 18ish and holds. I dont have a boost controller so its running off the pcm control.

 

Yea i do. I have a drop in, licp, uicp, buschur intercooler, full exhuast w no cats, and a retune. For guages i have an oil pressure guage, wideband o2, and boost guage.