Gas oven problem

i have a whirlpool gas oven model # sf262lxsq0. the burners light but the bake and broil will not light. i replaced the igniter for the oven but it still won’t light. i can light it manually (when i have it taken apart) but of course it will not relight after it reaches temperature and cycles down. the gas safety seems to work as the gas stops flowing a few seconds after i try to turn it on and it will not ignite. i am trying to figure out what part needs to be replaced as all the local repairmen charge about $100 dollars just to show up and it seems it only takes a few minutes (according to videos i have found on the internet) to replace all the parts i suspect of being the problem. any help would be greatly appreciated.

Hi.

Look at this links and see if this will help you.

Simon.
Theory of Direct Spark Ignition.pdf (94.6 KB)
direct spark ignition problems.jpg (45.8 KB)