If and when I get my car on the dyno.. Will tuning it help with the jerky feeling I get when boosting then lightly letting of the throttle. The car jerks back and forth pretty bad. And can my problem with reving then dying when the rpms fall down to normal like the engine cant catch itself?, flywheel from what my cousin and i are thinking.
it could possibly a small hotside... on my old 50 trim and crusing at 70, if i were to tap the throttle i would see boost and the car was really jerky... like as bad as hitting the gas from a roll in first gear.
I had the exact same problems, and it was the blow off valve fluttering. what kind do you have? even if it is recirculated, I spose it could make strange problems if it's not closing when it should.
What is a GT-s? It's probably your blowoff valve, my evo did the same thing after installing a Forge, as well as a greddy type RS. Try a different BOV, it will help.