'12 sunny-please help before i light it on fire

[sc00ter]

Why was it off the road sitting for 3 years? Low miles don't always mean taken care of. Check the following:
Check the engine valves/lash. Over tight valves do bad things quick.
Stator failing?
Correct spark plug?
Plug cap tight fitting on spark plug?
Loosen gas cap and see if symptoms persist. Could be vapor lock.
Possible transmission issue.
You Tube is your friend for how-to procedures.
Keep us posted and good luck.