Gas not getting to stove to ingnite

It sounds like you may be "vapor locking" the grill...after you are done cooking on the grill, how do you shut it off? Do you close the tank valve first then close the burner valves or do you turn off the burner valves then shut the gas off at the tank? If you turn the burners off before turning the gas off, you are creating a "vapor-lock" where air gets trapped in the line and you get the sputtering you are talking about.

Try this first, turn the gas on, then light the grill...once it is lit, turn off the gas and wait for the flame to fully extinguish then turn the burners off. Now try to light it again...if it is still sputtering, repeat the procedure above to purge the air out of the line.

If that procedure does not fix your issue after three tries, go get a new line and regulator and install then do that same procedure again. This should fix your issue once and for all.

If you experience any trouble with this, let me know here. Good Luck!