Hellcat Dual Pump fuel pressure drop

[uglyman8]

So we have a dual drop in setup from Tapped in a slightly modded Challenger. There is a drastic fuel pressure drop when trying to go WOT. Fuel hat removed twice and checked for cracked pumps and o-rings. FPCMs checked individually multiple times. Wiring gone over again. Everything so far tests fine. The car drives fine unless WOT. 39-43 fuel rail PSI at WOT when commanded is 80 psi.

Anyone have an idea or experienced this issue?

1200cc FIC, pump gas, 17 psi boost.

[L4staero]

Can you see the commanded FPCM duty cycle in the log? Does it drop to 53.9% at WOT?

[uglyman8]

It says 54% always. At WOT, its 54-54.9% and the injectors take up the slack of the fuel pressure.