On my printer (HP) I have to let about 2oz drip out to equalize the pressure in the print head; some kits supply a syringe and special adapter to **** it out, but I just let it drop. Takes a while. I don't think your canon BJC needs this, though, as it's a completely different design. Are you sure you're using the right ink?
Pentium IV 2.4C Northwood- M0 stepping @ 3.2GHz HT
Air Cooled w/ SP-94 heatpipe & 92mm Vantex Tornado at 45C
4x256=1gb dual-channel 2-3-3-6 OCZ PC800DRAM @ 890MHz 3-4-4-8
MSI Neo2-PLS w/I865PE & SATA @ 4x267=1068MHz
BFG GeForceFX 5900@485/967MHz = 6284 3DMark2003s; dual-head 21" CRT & 19" LCD