p306 misfire questions

[97blueyuk]

Okay so after changing my o2 sensor my cyl 6misfire is back. Ive replaced plugs,wires,and cap. Tomorrow I am pulling the plug and replacing currently using autolites until I get the bugs worked out. What else could be my issue here. What tests should I run or have someone run if the plug isnt the cause?

Thanks for all your help with this truck so far

 

[JKmotorsports]

Did you check the fuel injector to make sure it is operating properly, not clogged, etc?

 

[97blueyuk]

Actually no i didnt. Didnt even think of it. Will add that to list thanks

 

[SunlitComet]

it is call a injector balance test.