Based on you original post, you sound like you have three problems runs rough until warm stalling at each traffic light stop lack of power I can't help with the lack of power, your going to need to see if you actual have a lack of power or have just got used to the R400. There was a thread on here not so long ago about a R400D lacking top speed, which I assume is the same thing, which was resolved with a trip to Track N Road rolling road. They have the Caterham Software, so can change the values/map in the locked MBE and apparently transformed the car for the owner. Without that facility I guess the only option is a replacement unlocked MBE, if you find a lack of power, or a trip to the UK :-( I found with my 360R stalling and rough running until warm was cured with an adjustment to the throttle body, and not the way you would expect. I ended up closing the throttle body (from its original position) using the throttle stop adjustment on the body. I am no expert, but I suspect the map is driven more by manifold pressure than TPS position at idle, given the lack of adjustment in the TPS. Closing the throttle butterfly at idle increased the manifold vacuum (you can see that with Easymap), but the strange thing was this improved the idle without any drop off in revs. Once I discovered this, I also did it to my friends car that had the inertia switch problem, it also made the idle much smother and more consistent. In an attempt to go one further I replaced all the rubber bungs and blanking plugs on my plenum, the originals where just simple rubber, with much more substantial silicon items. This didn't make any difference, but they didn't flex as much. Worth a check if you have any perished rubber blanking plugs. Finally has you car got a battery isolator? If not then you will have to disconnect the battery to reset your MBE. The MBE is permanently powered on the two duratec cars I have looked at. Resetting the MBE has never cured anything for me, but its worth a try.