oven wouldn't light

The gas valve (recently new from partselect) wouldn't open, or sometimes it would open just enough to let some gas escape! I read from others that just because the igniter was glowing, it might not be putting out enough voltage to trip the gas valve. A check of this confirmed that it was sending just over 3V to the valve - not enough to fully open it. I felt confident that springing for the $60 would solve the problem once and for all. After replacing the igniter, the oven lights in 10 sec or less, and this is a 26-year-old appliance! PartSelect to the rescue again!