If you have a nanocom or know someone that does, hook it up to see if it's throwing any codes.
Outside of that:
Pull and clean the intake sensors (AAP on intake manifold; MAF between air box and turbo; MAP connected to the air box lid). Can be cleaned with electrical cleaner or brake clean.
Check the air filter.
Pull the red connection to the ECU (under off-side seat), check for oil and clean (elec cleaner or brake clean).
Let us know how it goes.