[bageantj]

Will start and run fine drive fine then po300 ,can restart and go again but keeps on going back to misfiring. Have tried a lot but haven't figured it out. Has new coils, plugs, crank sensor, cam sensor, throttle sensor, o2 sensors,iac valve, computer, checked over for vacuum leaks, fuel pressure steady at 60 psi at all times and I probably forgot a couple things oh the timing chains have no slack,I've just been doing everything to eliminate anything

 

[bageantj]

Will start and run fine drive fine then po300 ,can restart and go again but keeps on going back to misfiring. Have tried a lot but haven't figured it out. Has new coils, plugs, crank sensor, cam sensor, throttle sensor, o2 sensors,iac valve, computer, checked over for vacuum leaks, fuel pressure steady at 60 psi at all times and I probably forgot a couple things oh the timing chains have no slack,I've just been doing everything to eliminate anything

 

[bageantj]

Also all four o2 sensors read circuit high and the cats are hollow