I have a question, have you installed your air filters as of yet? It seems like the air filters might not be installed. Please install them if they are missing. You might also need to prime the cartridges, even if there's no air in the lines, priming the system will allow proper ink flow.
In order to prime this system all you need to do is grab the syringe without the needle and pull the cartridges out of the printer. When the cartridges are removed look for a rubber plug at the top of each cartridge and remove the plug. Stick the syringe in the hole that's exposed and then draw about 2ML of ink per color.