Back fire and miss fire

[Mark CSL]

The CSL was back fireing when cold and missing when i went to give it the beans.

Took it to bmw today, turns out to be the flap on the airbox,
pontomiter fault.It gave the tec date time and air temp inside and out,
cool machine they have reset the fault codes and said if it does it again
i shall need a new Pontomiter , and then if still the same i need the flap motor.

Pontomiter £47 + vat

Flap Motor £80 + vat

PART 3 AND 4 OF THE PIC

We shall see how it goes
I have cleaned the conectors for the 2 things to see if this helps