problem pressure rail

[raul32]

i have problem with misfire 5 and 6.. i was change high pressure but problem persist...
I have removed injectors 5 and 6 and they are dry of gasoline. I have replaced them and it still persists. I checked the electricity and it is fine.

 

[ktb_e92]

The electricity (coils) may respond fine, but are the spark plugs a proper set & correctly gapped? NGK 1-Step-Colder plugs are generally suggested. If under/at ~550hp, 0.020" is an acceptable gap. Above that level, it's mainly suggested to have a 0.018" gap.