Disconnect connector where the two wires come to from the ignitor inside furnace.
Place meter leads into the furnace end of plug, set t-stat to call for heat and watch and see if after about a minute or so, you read 120VAC for about 35 seconds.
IF you do, ignitor is most likely bad.
Let me know what you read and will give ordering info if needed.
Some people are Humbly Grateful, while some are Grumbly Hateful.................... Which one are you ?