My goodman furnace is not igniting my burners
No fuel.

Verify that you have gas supplied to the unit.

Also, an automatic gas valve sometimes malfunctions by sticking.  After you have verified that gas is supplied to the unit, give the automatic valve a solid tap with a hammer or a wrench during the start-up cycle to see if it opens.  If so, then you need a new gas valve.  (Do not tap the valve hard enough to damage it.)