I just finished with my intercooler install, zzp stage 3 IC, vw radiator. Now when i go to start the car it will run but the idle is all over the place. It keeps reving up to almost 3k then dropping into the 600's where the engine sounds bad and almost dies. It does the same thing if i shift it into neutral. Checked my spark plugs, all my sensors, currently have the MAP unplugged because i was testing the fuel regulator. When the MAP was plugged in it was reading up to 100 KPa when the idle dropped into the 600's. I did not see any codes go off on my scanner.
For the install i also used a new modified LIM in case that matters.
Here is one of my scans without map sensor plugged in.
