Lack Of Power

[andytaxi]

hi all

my 2005 1.9 tdi 90 bhp recently broke down on a1.started with severe power loss then came to a halt and wouldnt start.rac towed car home.problem was i9n tank pump wiring corroded.fixed this problem with new spade clips.started ok.but now has slight lack of power.at diesel specialist at the minute.injectors tersted ok.maf ok.no fault codes showing.is high milage but was perfect before,never smoked or used oil.it will run perfect round town but you have to keep dropping down to 5th gear at about 50.and when you get to about 70 on motorway pick up is sluggish.it is not jerky.very smooth.feels like running with handbrake on. any ideas?