more than likely an injector o-ring have alot of problwms out of them
the resistor mod doesnt add any noticeable power anyone who tells u it does is a liar have a '01 6nz 500 turned to a 550 with 5232 injector codes...
i have the fuel temp and the boost resistor and all they do is make it smoke they smoke bad like a 237 mack with the fuel wide open