Car bogging with more the half throttle
Hey guys, first time posting to the forum, however I have spent a large portion of my life reading this stuff. But this one I just cannot work out on my own
I bought a 32 skyline that has been converted to an rb25. It had a massive list of problem when I first got it, but it still has one
Whenever you use more then half throttle it makes less power, drives mint using half the accelerator, but get to the second half and it dies in the ass, feels like the car is pulling backwards ..
Otherwise car drives good, idles perfectly and free revs well. Doesn't blow any smoke or do anything it shouldn't.
I have replaced plugs (gapped them to .8), replaced afm twice, swapped out TPS and adjusted it ( both TPS adjust to ~.045 - .41), replace IACV with a known working one, checked timing, replaced injectors rail and regulator, put a bigger fuel pump in.
Let me know boys. Just want to drive this car properly