td5 injector harnes

hi can any one give me some advice i lust fitted new injector harnes as was getting oil down to ecu she still seams splutery at about 2500-3000 rpm is this cos i still got oil in thier or is something elss to blame sometimes wish id never seen blody thing sorry about spelling but i think you all get the idea

Did you clean the ECU connector out fully?

ye i did do i need to take ecu top off and clean out inside will brake clener hurt anything if i flush out the loom