From where you are, I would first load another base tune for your model and year from the tune ecu site and see if it cures the problem. If problem still persists, confirm the vacuum lines to the TBs are connected and to the correct TB. If connected correctly, check plugs for excess fuel saturation or look inside each TB for fuel squirting while turning over the engine or remove the injectors from engines (leave them attached to fuel rail) and attached a clear plastic tube to each injector that allows them to drain into a container and motor to confirm same fuel flow in all tubes while motoring the engine. If all is well, check a each cylinder for spark. If all checks, confirm the crank position sensor if properly installed and functioning. If all this checks out, recheck the cams for proper timing. Just guessing here.