Right guys this is hacking me off now, ve got a mk1 octavia vrs with the following mods

Custom remap

Split-r dv

Induction kit

Turbo back exhaust with sports cat

And a boost gauge

The problems i was having was boost fluctuations now ive solved this bit as my split-r is the cause, now im left with smooth boost up to 4000 to 4500rpm then the car develops a serious splutter the car jolts back and forth like a big hesitation does anyone have a clue what this could be

Coilpacks?

Sent from my iPhone 4s

Do you know anyone with VCDS or a fault code reader? Could be worth checking codes if you haven't already?

Gonna check the coilpacks by swapping with mate on sat