You can take your car to autozone or advanced auto to pull codes. If the gas is old, you will get the same results. Open the gas cap and see if it smells like gas or varnish. You need to add a ton of fresh gas to it and let it run through the system. Change your fuel filter too. If a car has sat for that long, it is best to pour a little bit of
tranny fluid down the cylinders before start up. Those rings and pistons have not moved in a while and they cannot seal correctly unless you help it along......