HPFP can definitely cause a limp but the coolant temp has caused it also. I have limped when my oil temp was below 270 and I'm assuming that's what caused it.
Our coolant gets incredibly hot but there is no gauge which hides this from most of us. Therefore we don't talk about it. An aftermarket radiator is what's needed. See the 335 is and the 1M; N54s with additional radiator capacity.
OP, do you have an MT or AT? Also, zsapphire is correct.