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RB26 going lean after fuel system upgrade
Rb26 in s13
Replaced stock tank, lines, fuel rail, FPR and filter with the following
10 gallon Fuel cell
-6an lines for supply and return
1 255lph hi pressure walbro gsl392
trickflow fuel filter
godspeed fuel rail
Aeromotive FPR set at 40psi
This problem didnt exist before this fuel system was installed into the car. Before i was using one walbro 255 intank fuel pump with stock lines and nismo FPR.
The fuel pump is mounted even with the bottom of the tank. Gravity should feed the fuel to the pump so i believe this is correct. My problem is that at high rpms in boost im going lean 16-18 A/F ratio and it starts cutting out and breaking up and I let off the gas as soon as it happens. Ive tried raising the pressure and running direct battery power to the fuel pump for full voltage. Still no change. Bad brand new pump? Any suggestions would be greatly appreciated.
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