Ok I have a notch top kouki Sr20det swapped into my 72 240z. The motor started and ran great on the first test, but something changed and now it won’t idle at all. It bogs down and dies immediately. Whenever I unplug the maf it’ll idle..... runs like shit, but it’ll at least idle. Brand new o2 sensor, brand new coolant temp and knock sensor.
I have a wiring specialties harness installed to it, a z32 MAF, an intercooler and piping kit, how bov, and everything else is pretty much stock. I deleted the IACV system thinking it might solve it but to no success. I’m running a Fuel Pressure regulator and that didn’t help either. It’s got a way to 255 pump.