Nissan Repair Questions? Ask a Mechanic for Answers ASAP
Hello, my name is ***** ***** I am a professional here at Just Answer. I have noticed that your question was not getting a response and thought I would see if you still need help with this.I apologize for the delay and I hope I can still assist you with this here.If you sure the injector are pulsing and not sticking open and your still fuel fouling the engine I would install a fuel pressure gauge and monitor the fuel pressure. Normal fuel pressure on a properly working system should be right at 34 to 35 PSI. Check this and post back with the results and we can cork from there if need be.
Im thing if the fuel pressure regulator has failed it will cause excessive fuel pressure and if that is the cases it will cause the injectors to dump fuel. A fuel pressure test will determine if in fact that is the case.
Okay, let me know the results of your testing and we can work from there.
Are you sure the injector are not stuck open due to a fault ground from the computer. The have to be wide open if you getting a hydro-lock.
Okay , let me know.
Until you figure out where the excessive fuel is coming from there no reason to chase these codes.
46 PSI is on the high side and as long as the fuel return is working as it should then that only leaves the fuel pressure regulator. Normal pressure should be right at 34 to 35 PSI.