Misfire stumbling and hesitation

[Frustrated]

I'm having a weird misfire problem .I thought i figured it out so icleared the codes and it started all over seems to be every time I disconnect the battery or clear codes it starts all over again and clears itself out to a point. Hopefully somebody can help me or guide me in the right direction I believe I've covered all the bases and checking things like plugs wires checking Spark injector pulse timing marks EGR port clean throttle body like I said thought I had it figured out after I changed plugs I cleared the codes and it started all over again you can drive it for a little while and it clears out up to a point But as soon as you clear codes and disconnect battery it gets worse please help