i had aproblem with my clio mk1
i have chip (superchip) & open filter (piper ) .
the prob with the car when i got to 4500 rpm and more the car was cut
and sometimes i had knocking too
im allways think the problem cuz the chip
but the guys from reno fix it
they think frist that coil make the problem
but finally the ignition unit was the problem .