Bryant Plus 90 Error Code 34

Code 34:Diagnosed--Replaced ignitor, sensor, and electrical board.!!Now....Turns on, fan runs, ignitor gets red, flame come on for about 3 seconds, flame shuts off....Code 34 again UGH. Please help.
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replying to jdprincipal!, Iggy wrote: Great job on the normal stuff! Here's a video, 4:30 to 9:40, that covers the other causes for short cycling - "Why does the gas furnace short cycle"
https://www.youtube.com/watch?v=3LBut8fWcw8

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