What kind of gas are you using? Ethanol? If you add a inline fuel water separator it may help with the injector corrosion . I got a 2006 75 etec , It came on a boat I bought , didn't run , i got the computer cable and found the cps sensor was bad changed it , 2nd trip out the high pressure fuel pump went out , changed it , 5 trips later cylinder 3 injector is bad . I have worked on the motor more time than used it. I am pulling the injector today to clean it if it doesn't work I will sell the motor for parts.
