[robbyy]

cummins 4t390 - fuel in oil. changed mechanical pump to electric pump,,4 new injectors,,injector pump out for rebuild. could it be something else,,??

 

[char1355]

If you eliminated the lift pump then likely suspect is a bad seal in the front of the injection pump. What pressure is your electric pump putting out? Is this a VE pump on the engine?

 

[robbyy]

pump rebuilt and installed runs great.. pump seals were hard old my have been original to machine. main shaft worn new springs two of them broken brand //thanx for your help