I bought this ls400 8 months ago and relaxes so much parts but couldn’t figure out what is wrong with the car at this point. I already replaced cap and rotor,wires,plugs both coil packs,alternator,ecu capacitors,fuel pump,fuel tank due to being rusted and having a small pin hole,fuel filter twice,crankshaft sensor,main 02 sensor,hollowed cats. It turns on runs fine and after a little bit will sputter and not accelerate I turn it off then back on while driving and it’s fine for a little bit before doing it again.