WJ idles but misfires and dies when given throttle...help

I have a 2000 jeep grand Cherokee Laredo. The jeep starts up fine and will idle all day long, but as sson as you go to give it gas it misfires and sputters then shuts down...The jeep is throwing codes p0351 p0352 p0352 (coil pack a b and c). I've checked the coil pack and it is getting spark. 50psi consistent at the fuel rail. While diagnosing it injector 2 is loosing pulse when ever I give it throttle. I've replaced the coil pack, the ECM, the injectors, crankshaft position sensor, and throttle body position sensor. I've looked over the connectors to the wiring but they seem to appear fine. I'm lost and I've already thrown a lot of money at this problem please help. I need ny jeep running healthy again.