Just replaced my airflow sensor then got rush if blood to head and de EGR'd it then replaced the injector harness and yesterday had it remapped by the nice man from Dynachip, If anyone was thinking of doing this then dont think any more , just do it, it is a completely different car to drive, nice and smooth through all gears but then just stick your boot down a little harder and it pulls like a train in all gears fast enough to embarass many cars at the lights, it even now pulls hard in 5th if you want it to ! wish I had done it earlier.