Oven would fill up with gas before igniter got hot enough to lite it

Remove bottom drawer,open oven door,take oven racks out,use flat tip screwdriver to remove two screws in back of oven. Then remove cover over burner and igniter.Reach under oven and unplug igniter,while down there use 1/4 inch nut driver and remove two screws holding burner. Then remove one screw inside oven in front of burner. Pull burner and igniter up and out of oven.I did not unplug stove or turn off gas some people may want to,if you have to move stove out to work on it