Amana Big Oven Will Not Heat

slow to preheat??? long cooking times??? smell gas while in operation???. all signs of a bad oven ignitor retails for about 60-65. easy enough to replace reomve the lower panle of the oven itself and you'll see the ignitor right there 2 ***** mount that to the bake bar and pull it out, unplug the wire harness, plug in the new one and remount.Start baking