Too much gasoline injection

Hello I have a problem with a 1999 Motor 4.0 SOHC and spends too much gasoline and is contaminating the engine oil someone can help me thanks

If you are contaminating the oil with fuel, it is most likely that one of the injectors is open throughout the time, this is not very good to me with a nissan and for not seeing it in time it folds a connecting rod so that I recommend that you check it, take out the injectors and hand Crushed, when the mountains put vaseline or fat so that they do not cut themselves or grate and let us go as you are.

Thank you very much for the advice.
The injuries were disassembled from the rails and took them to a specialized place pressed them and not dripped told me they are fine.
The problem is that the rails carry a lot of gasoline pressure also change the gasoline pressure regulator that carries the pump and now that they checked with the scanner, the broken MAF comes out, I have not bought the MAF and as soon as I change the oil immediately contaminates it and leaves it diluted without viscocity and very black thanks for the tips

Friend if they are one of the injectors that carry on the side and not above Czech that does not pass fuel to the combustion cameras when the injectors are closed, the orrines are of great importance in this type of injectors no longer seal, now if the problem is a lot Fuel, and if nothing works put a new return line. Good luck and Avisos us, the MAF sensor affects only the calculated air account, if this mixture is rich or poor but I do not know if at the level of polluting the oil.

Thank you very much Kikemec I will change the orings. As you say well, of the gasoline pump it is proven has 80 pounds of pressure, the worrying apart from the excess of smoke is how gasoline arrives at the oil as the question has to do with the tps, MAF, EGR sensors, in the voltage of the injection because they do not send the exact spray? It's as if they stay open all the time thanks Kikemec