Well if you haven't yet you could do new plug/wires, air filter or 40$ homebrew one. Clean the TB and MAF. Car will probably run and feel better. I know just doing the air filter and MAF on mine made a world of difference. Mostly because I think I had the stock air filter in the car. I'm in the pickle do I do some go fast N/A mods, HV3, plog, dp or top swap. Also clean that engine bay and interior real nice for added HPs