Tried the cam position sensor in my mates mondeo to rule out that , came back and put it back in and took the car for a run the blue smoke cleared and it started to run quite well for a wee while until it went into limp mode with the glow plug light flashing code reader showed up p0251 , cleared the code swithched off and resarted it and gave it a bit of a welly the glow plug light and engine management light came on again p0251 and N/A for the eml , rebooted it again and it now stutters like its away to cut out then goes again !