Nope, straight out of the box. When i first started the car I turned the key, let the fuel pump run and cranked for about 20-30 seconds and it was off to the races. No problems since then. Just about through the first tank and its running great. to modify my last post, I think my mileage has improved slightly given the mileage on this tank thus far.

Also, it starts up on the first crank in the mornings. Prior to the new injectors, 70% of the time it took two cranks to get the 300e up in the morning.

I would estimate the time to complete was about 2-3 hours. I spent a lot of that time looking through my tool box for all of the different 5mm allen keys in my collection. I have one of those magnets on a telescoping stick, best money I ever spent on a tool.