ok need some help before i pull my hair out well whats left of it 97 grand cherokee 4.0 at 4x4 it has a intermitten miss i can be putting round 45 to 50 it will miss the over head display on info center has sc on it she has new bosch fuel pump assy with seafoam new ecm plugs wires cap rotor have cleared all codes drove again when miss comes back only codes i pull are 55 fuel code and 12 battery disconnected any suggestions

 

Sounds like a weak fuel injector. Try a JY set and see if it makes a difference.

 

Try a new cam sensor (aka the pickup coil).