ok so its been 2 weeks since i bought the car. already got pulled over for window tint(bought the car like this) so now i have to remove the front 2 window tint.

also I've been noticing a random misfire is what it feels like. it doesn't throw a code, but if say I'm in 4th and downshift to 3rd and hit gas pedal to accelerate, it will 'hicup' like a misfire. it doesn't do it every time, just randomly.
also when idling sometimes it will hicup and rpm will drop and come back.

so far i have done oil and filter change, sparkplugs, trans gear oil change.

heres a side question. I did the swiss cheese mod, and the car felt slower than before. i wasnt doing it to make power if it does at all. but it just felt different.
so i glued the piece back in that i had cut out.

and, is the cabin air filter washable?

 

hmm i would say u might have a vac leak. it might be small and only loose pressure at certain times and give u a small hickup. I would inspect your vac lines and check valvles. Esp. Around the air box. U might have just left something a little to loose.