Ran out of fuel replaced with fuel and still wont start?

look at fuel pump, fuel filter, and fuel pump relay. If it has sat for long time, may have clogged lines. If you check relay, and that is good, look at pump. If pump is good, look at lines. If lines are good, look at fuel dispursing system, (Carb,TPI, TBI, etc) If fuel is going to all places, look at spark. Pull plugs and see if they are clean. May need to search for photos of dirty spark plugs