Got a ke-38 with a 4afe conversion with a custom vj20 turbo setup.
Decided to service it a few weeks ago (oil change, plugs, fuel and oil filter, leads, dis cap etc) and I'm not sure if its related but its been running like crap ever since. I blew an oil seal in my turbo at the same time so i swapped the turbo for a newer but the same model turbo. changed all that and thought it was my plugs all along. Tried iridium plugs at .8 gap with a heat range of 5, it runs good until the turbo spools. Tried standard ngk with a .8 gap and a 7 heat range, same thing. then i got tried ngk racing iritop 7 and it runs rough but will boost to 20+ pounds but only with a tiny bit of accelerator. If i accelerate too hard it will just back fire and carry on like an old tractor.
Also i blew a 30A fuseable like from the ecu harness (i think) and i replaced that at the time of my service. I have a haltech aftermarket ems, not too sure if there is a stock ecu, and maybe it has crapped itself. Or if the haltech reset itself and i need to dyno it again. It seems like its receiving too much fuel and not burning it, causing it to flood and back fire.
I also think it maybe the fuel regulator from the aftermarket fuel pump too. Need some advice badly. I could replace everything before i have any success.