Williams clio engine problem

[250onak99]

Can someone suggest why my williams clio mk1 starts perfectly and runs well up until the second flap(bottom) opens? Once over a certain amount of throttle the large flap opens and thats when it starts to play up and eventually stall.Thanks dan.

 

[Coops Mk1]

Could be all sorts tbh chap, best bet is to head over to either Williamsclio.co.uk forums or the Facebook groups