i bought a honda accord ex v6 with 60k and im having a mutiple/random misfire (p0300),also p0301,p0302,p0303,p0304,p0305,p0306 i have changed all 6 plugs, all 6 coil packs, cleaned the egr ports, replaced the cat, both o2 sensors, fuel pressure regulator and engine computer and still the same problems please let me know if u know of anything else i could possibly do pm me or text me 218-393-4677 thanks Dave

 

May need a valve adjustment.

 

i agree with valve adjustment and also clean the injectors

 

also did those forgot about them, its a really weird thing before i changed the fuel pressure regulator i had pinched off the fuel return line and it ran mint so i figured it was the fpr so i changed it did make a change and i have heard that it could be fuel pump problem

 

ttt