Order a Ross-Tech dongle to read your codes or find someone that has one. We need to see you real codes. Generic scanner will not read them all. www.ross-tech.com

also try swap your injectors around to test them further.

look up the cam lobe problem when you have time.

There was a Flash out for the ecm on certain models. What year do you have? I don't think this would apply to you though it was more or less for misfires on cold start and the flash prevented the ecm from recognizing misfires on start up for a set period of time until warm up.