codes p0272 ,p0275 p0305

[FL-F350]

hi guys i have this problem since 4 moth ago
p0272 cyl #4
p0275 cyl #5
p0305 cyl #5 misfire

i replace all the injectors for news ones motorcraft from the dealer and keep comin the same codes plus the flash the computer bla bla

the injectors computers is at 47 volt plus i got replace the agr vlave icp valve the ipr valve new batteries

any help help

[dannyboy950]

you probably have a wireing harness issue