OK i have a 92 240sx coupe with the stock KA24DE. Its n/a all it has is a intake. Its having problems accelerating it just doesnt want to accelerate. I thought maybe the fuel filter was clogged so i changed that but it didnt help. It has a rough idle as well. It also has straight pipe exhaust all the way out the back which im sure isnt helping but i just got it today and i will soon change that. So any help is appreciated