My furnace has been re-igniting itself during its cycle for three weeks. Blower comes on, then it clickz/ignites 4-5 times before shutting down. Replaced the cad cell, transformer, primary relay unit, motor, pump, nozzle, firewheel... nothing fixed the issue, running out of money on service calls and not confident in tech.. please help!

I'm not exactly clear on what is happening. When you say "blower comes on", do you mean the burner motor or the main circulating fan?

How long is it between these 4-5 ignition cycles?
How long, start to finish, from when the burner first starts until it shuts down?
A short video would be a big help if you can make one, post it on you tube or similar site, & provide a link here.

You don't have a tech. You have a parts changer.