I have a GE Profile Spectra gas stove. When I try to turn on any one of the 4 burners on the stove top it takes up to 90 seconds for gas to reach the burner. Once one of the burners is lit the rest of the burners will light immediately. After things are turned off for awhile and I try to turn on a burner again I have the same problem. This is a 4 year old stove. The problem started happening 6 months ago. The wait time seems to be getting worse. Any ideas what is causing this? Is there a master regulator that I can change easily?

My GE XL44 oven has a good glowbar ignitor and the lower bake burner comes on but then the full flame suddenly seems to loose the gas feed to a much lower flame then the flame goes full again,this ossiliation goes on and on within seconds passing.The flame should stay full untill the oven heats to 350 degrees because of this ossiliation it takes a full hour to get up to 350. My broiler works fine with full constant flame.I think it is a bad oven sensor but where is it located and where can I find help about the area to access to find this bake burner sensor.I have no repair manual.I have a GE XL44 self-clean gas range model#JGBP34GEP3AD Serial#GL222800P. I could use some help with my problem oven! THANK YOU!