missfire at 3500 rpm

[nova kitney]

hi guys.ive owned my xe nova for about 6 months now and lately shes developed a strange missfire/fuel stutter.it only happens when im on about half throttle between 3-3500rpm.if i put my foot down or change up so the revs drop to about 2000rpm it clears straight away.it also doesnt happen if im accelerating hard all the way through the gear.very annoying.:mad: .any help would be much appreciated.

[lomas]

could be the fuel pressure. mine did the same couldnt accelerate slowly unless it would shudder, miss fire so but a 3 bar regulator on and seemed to cure it and put the blue injectors in

[nova kitney]

cheers mate ill giv it a go