Qpeng missfire / hesitation

Hi guys

im running qpeng management in my mk1 golf and having a nightmare with a slight hesitation/misfire just above idle when warm

The car runs fine if you press the throttle hard it boosts all the way through but as soon as its up to running temp it will hold back and miss while just touching the throttle, making it a pain in town / traffic

It will run fine if i pop in a new set of plugs i can drive around its fine gets upto temp etc all is good then start it up the next day fine drives fine while warming up then starts to play around when warm

ive fitted new plugs copper and oem ngk
new coil packs

any ideas???