Remove all four burner caps and then with a sewing needle, clean all the gas orifaces out. This style of burner over the years will accumulate a buildup of gookus in the port of the oriface making it smaller, hince the small flame and sometimes can't get the burners to light with the electronic ignition becuase gas volume has been cut down so much.
Just don't drop the needle all the way down into the oriface and gas line were you can't retrieve it.
That's what I already tried. I removed the burner tops and all the holes appear wide open and unclogged. Could there be buildup somewhere else down the line? Thanks.