sr20det hesitates after vvt :s

[tom2k7]

hi my mate has a 14a with full exhaust, front mount ic, blitz filter, gizzmo ebc set to 1.05 bar it does spike a but a very small amount, the car has a lose of power from 5k like its holding back, he has just put sum grade 7 iridium ngks in which havent done anything at all, my instinct would be coilpacks but i could be wrong... help please

[Jez]

Valve float?

[Jonny]

Does he have an uprated fuel pump too?

[Dan@DB-Power]

The title says after VVT, does this mean you have changed the VVT sprocket and it's now playing up?

[tom2k7]

yee has a 255 walbro which is brand new from fse!! the pump its self is quiet noisey sounds like when phono leads for a sub are on the same side as a power cable lol he hasnt changed the vvt sprocket dan, whats is valve float jez??