Greetings,
Old ink, a worn out or partially clogged printhead (due to infrequent use) can all cause the problems you are describing. Have you performed a printhead alignment?
Also, a dirty timing (encoder) strip is something else you can look at.
Have you checked this:
Canon Knowledge Base - Clean the timing (encoder) strip - MX922
~Rick
Bay Area - CA
~R5 C (1.0.9.1), ~R50v ~RF Trinity, ~RF 100 Macro, ~RF 100~400, ~RF 100~500, ~RF 200-800 +RF 1.4x TC, BG-R10, 430EX III-RT ~DxO PhotoLab Elite ~DaVinci Resolve Studio ~ImageClass MF644Cdw/MF656Cdw ~Pixel 8 ~CarePaks Are Worth It
