a. My car doesn't rev past 1500 with light throttle. If you eventually lay on the throttle enough for it to get past 1500 when the boost kicks in the entire car shakes erratically.

Does my car just need a good tune? Could the A'Pexi S-AFC be throwing it off if improperly adjusted? I just bought the car.

My mods include: GReddy FMIC, Koyo rad, APexi intake, APexi N1 catback, some sort of hi-flow cat, a downpipe of some sort, blitz bov (doesnt really count as a mod, lol).

Is this what Fuel cut is? I've never felt this before driving any car, it's unbearable for daily driving.

Should I look to see if an FCD is installed? Where would it be?

I have been searching the forums but the search function is so annoying with the 20 second waits and I have been trying to google for S-AFC instructions but to no avail.

b. The car grinds gears unless you FULLY depress the clutch. Anybody have insight on how to fix this?

c. I'm new to tuning and all these gadgets. Are there write-ups for the S-AFC or this "Rotary Performance Air Fuel Ratio" meter that are in my car?

Please help, it was a good deal and looks killer. I just want to be able to drive my car. Thanks again guys.