ok heres the lowdown.. 2 months ago i had four CEL codes, P1399 P0300 P0302 P0301. basically multiple cylinder misfires. those same 4 codes just popped up again today. i swapped coil packs around 2 months ago so i dont think thats the issue. I have also read that its most likely fuel injectors. Does anyone know this issue more deeply and can tell me the CC's of the OEM honda ones?.. THANKS!

 

OOOPS... forgot to mention its an 2001 AP1. mods are k&n fipk intake, invidia duals with TP.. and the spark plugs were changed 2 months ago when this first occured..

 

i heard the fuel injectors are USUALLY the cause but i think i also heard that valve adjustment can fix it too. mine had the same issue and i checked my injectors, one was completely gone. i changed it then the problem was still there. so i adjusted the valves and codes were gone.but that is my case. a stock ap1

 

ok guys/gals, ill be doing the valve adjustment first so im not spending money where theres no need. that'll be done in a few days. hope thats the issue..