I have a 2004 Ford focus 1.8 TDCi. It has about 42k miles on the clock and I know the car's history, it hasn't had a hard life.
It is showing the Engine lamp and when I scan the DTCs using Formidable it comes up with P2263, Turbo/SuperCharger Boost performance.
Now I have done as much homework as I can on this, I have searched on-line for other such conditions and its not easy to come to any firm conclusion what causes this. Things on my list.
Turbo vanes getting coked up with soot and sticking - Well I can manually move the turbo vane arm, although the vacuum actuator resists me, it seems to move freely. Not conclusive but it doesn't seem to be sticking anyway. When I start the car, I see the turbo arm moving from fully open to closed. I can't be sure its fully closed, but the car drives quite well low down with plenty of pull.
EGR valve sticking - I have pulled off the pipe going from EGR to inter-cooler and had a look inside EGR as best I can. Although grimy, it didn't seem too dirty. When I manually apply vacuum to the EGR valve I can see it opening and when I release the vacuum it snaps back. Again, not sure if it is perfect working order but doesn't appear stuck.
Splits in pipes and hoses - I have checked all the hoses I can get at for damage, they all seem to be in good working order.
EGR and Turbo actuators/solenoids - These are the 2 valves on top of the engine block. I have used a vacuum gauge to check to make sure these are doing something. Again when the vehicle is started, I see both of these have vacuum, enough.. not sure but there is vacuum.
MAP sensor - Using formidable to monitor the MAP value during driving. This is where I don't know what to look for.
At idle the MAP value is 10kpa. When driving it will go up to about 22-24kpa and then go to 0kpa. So If I was in 3rd gear accelerating, up until about 3000 rpm, the map would be increasing then it goes to 0 kpa. After about 3000rpm the engine doesn't really pull at all and watching the Desired fuel reading I can actually see the engine controller is reducing the amount of fuel fed to the engine. Can any experts help me with that to help me understand what I should be seeing?
Also can anyone comment on the DPFE or pressure feedback sensor. Does a 2004 focus tdci have one of these, where is it located at and could it contribute to this problem.
Sorry for the massive brain dump, I've tried to do as much as I can to understand what is going on, now I need some help.