Originally Posted by
Cton
I have no FP internals, but if i was going to, id go with the Autotech through EdgeAutosport.
And yes the FMIC can affect your Fuel pressure, you now have less restriction, , meaning more air flow. And your pump just cant keep up with it.
Go the Autotech...
Keep in mind youll need to retune with the HPFP internals. here is why,
"A potential issue is that fuel pump bore and stroke have to be properly sized in the ecu for the ecu to be able to understand how to apply the fuel.
Essentially, the ecu uses a calculation based on hpfp size to determine how long to fire the solenoid on the pump to get the proper amount of fuel delivery to the rail."
And from COBB,
"These vehicles are particularly sensitive to hardware changes. For instance, if you
install an aftermarket CDFP or a different intake system, the MAF calibration will
need to be modified. Please be sure to reflash the calibration that is best suited
for your vehicle's modifications and the fuel quality you are running."