MID 128 SID 231 FM2 error code.. what does it mean and how to fix it??

[bravoo67]

Pablo today before I changed injectors I did injector balancing test again and injector #2 was -40% but this time injector #4 was showing +40%, 5th one was "normal" (+10%)

so I changed 2 and 4 and programmed all 6 trim codes because all of them wasnt maching previous trim codes in EECM..

after all that I did balancing test again and again injector #2 is -40% but all others seem to be OK..

Why its the same with new injectors in? Engine seems to misfire and has no power

Compression test shows 95% on all cylinders and there are no error codes

I did so much on this truck dont know where else to go

Please help

[Pablo-UA]

Reset injector ballancing values now, after you change injectors

[bravoo67]

I did reset injector balancing values and it is still the same: injector #2 is -45% and inject #5 is +50% and over .. what else can be wrong? engine harness?

[Pablo-UA]

the problem is in injector #5. Change it too.

Really we use to change all injectors on D12 engines. They are old now.... no reason to do one by one....