Gas oven. 4 burners on top. None of them are clogged and all the nodes are in tact. The front 2 burners act pecurely most of the time. When I try and turn on the either front burner, the back left burner is sparking. Obviously the front will not start. Some times I get the front left to start on its own after the back is sparking and then the front left sometimes starts. Then I can turn on the right front and it will catch as the spark is still on the back left but now in front right as well. Is this the spark module causing all these problems. Is that waht detects which burner to ignite? Also, it looks fairly simple to replace. How do I get to it? Thanks in advance!