interesting new problem please help

[wickedjester]

so at higher rpms and when i give it more throttle. For example if i downshift and floor it in will do this thing where it kinda hesitates then picks up but it does it repeatatly and i have no idea at all. and its has a rough idle



thanks in advance


o yah it is a s13 with a kade with a megan header/downpipe and a hks high power catback

[lflkajfj12123]

misfiring maybe?

[Addicted2Kouki]

whens the last time you had a tune up?

[wickedjester]

i havent since i bought it that was gunna be my first step