i have an 03 f360 has 111k mi on it and im having turbo issues it doesnt boost up till i hit about 20mph has almost no power off the line ive taken the turbo apart and cleaned it and everything looks brand new in tubo fins a in perfect shape i also cleaned the egr valve and it is still doing the same things the only mods i have is 5in turbo back exhaust and a tune from inovative diesel along with pillar gauges can anyone help me with this problem