I've searched on this site for my problem and there seem to be similar symptoms around but not exactly the ones I’m experiencing.
When I cold start 75% of the time my car will stay at around 400RPM like it’s about to stall. If I ever so slightly touch the accelerator the car will bring itself up to the normal 1500RPM.
In addition I’ve seen a lot of problems with people's cars missing at 5000 RPM. My car doesn't miss at 5000RPM but looses power after 6000RPM. I am getting full boost fine at 5000 RPM.
My cars only mods are pod filter, exhaust and large intercooler. The car is not running an aftermarket boost controller, so it’s just standard boost.
I'm going to take this car to a mechanic but wondered if there was something I could do myself to save money.
I have completed an ECU diag, changed spark plugs, fuel filter, cleaned airflow meter to no avail.