Kr missing

My kr is fine at starting up and runs a treat but when I I am just cruising and then got to put my foot down it bogs down missing like mad, just put plugs leads dizzy and arm On and still no different  any help would be good thanks 

I'm saying fueling issue man. See if you can pressure teat the metering head. 

http://www.vwgolfmk2.co.uk/forum/viewtopic.php?f=37&t=25972