hox

Hi Folks,
Been chasing a random misfire P0300 (2004 MSM) for about two years. Car will idle and occasionally stumble. Check engine light comes on when it stumbles. Swapped in new NGK coil packs, CAM sensor, TPS sensor, and new plugs. These changes did not fix the problem. Fuel filter is 3 years old, plug wires are 2 years old, fuel pump is 2 years old (DW 100). I also replaced the injector harness with a new, old stock part about 2 years ago.
The injectors are reman stock purple Densos. When I purchased them, they were fairly inexpensive ($12 each) and I replaced them at the same time as the harness, so about 2 years ago.

If I decide to replace the injectors, is there a better alternative today? New stock purple densos are no longer available except for a few scattered ones at a $120-140 each or apparently thru Ali Express but I do not trust that group. Reman injectors have to all be >20 years old and some internal parts on these are just going to be unfixable. Sure they may have new o-rings and show a good test spray pattern, but how long will they last?

Are there any new injector alternatives that work with the factory ECU?

I know the green supra injectors were thought to be a good alternative but these are also very old and deliver 305-320cc fuel. Was hoping to find a new alternative closer to the 265cc stock amount as I don't want the car running pig rich.

Thanks,
Scott