c270 CDi wont fire now loosing power

[3ways]

had a B service done as a week before the car would turn but not fire, it happened twice AA was called put easty start and it would fire.

put on a universal computer all faults cleared it happened again

the car would start if it was cold in teh morning, went to an independent garage had teh crank shaft and cam shaft sensor changed.

all good next day same problem
ut on a star computer rail pressure was aonly 80 when it should be 125 , diagnosed said two injectors gone out had one replaced as teh other one would not come out started fine but lost full power while driving back EPC visit workshop came on

any ideas have to have the second one injector replaced today or tommorow they ar ebosch 0445100121 part do they need to be programmed.

I have never had a loss of power before could it be due to the new injector fitted and teh other one not being changed.


any help would be much appreciated
my car c270cdi 155000 miles B service had all filters changed had a new fuel pump put in jan 2009

 

[allias]

Check your seals on fuel pressure regulator on end of fuel rail. I had intermittent starting problem and it turns out it was damaged regulator. I would nt figure this out if I would take it out. As I found out it was cracked on tip that goes inside.

If you need change seal - which I would recommend anyway, they cost ~£6 from Merc and it comes as kit of 3 seals. That the easiest solution for problems with inttermitent starting fault.