I had the same issue but after the pump and the injectors everything was A okOriginally posted by Immo
I had to upgrade my fuelpump (also have gt-s injectors).
My fuelpump couldn't deliver, especially when boost kicked in, so I was running mad lean (1:19 !!) and in higher rpms it got a bit better (1:15) but still too lean. upgraded fuelpump and all was fine.
My tuner said everthing is ok with stock fuelpump.So no change of fuelpump for me.Red-one said:I'm running stock pump and already putting around 260whp with under 12 AFR till redline..Its holding OK. No plan for change..
Do you have your wideband O2 readout? Because that is what the necessity is based on.Originally posted by Toyota T23
My tuner said everthing is ok with stock fuelpump.So no change of fuelpump for me.
Funny there is such a difference???
doubt it, think of it as having 4 huge injectores if the pump cant deliver the fuel the injectors cant add more fuel because their is no more fuel to add, best way to check if you need a bigger pump is to install a fuel pressure gauge if it falls you need a bigger oneToyota T23 said:Mabey it is because that i have 8 injecters??