3 – Since I ran my car out of petrol it doesn’t run right, it has petrol now, why?

Running out of petrol can cause the fuel pump to fail or the fuel filter to become clogged. If the fuel pump has failed, then it needs to be replaced. If the fuel filter is clogged, then it needs to be replaced. It is also possible that the fuel tank needs to be flushed out and new fuel added. Additionally, it is possible that the spark plugs or other components have been damaged due to a lack of fuel, and these would need to be assessed and replaced if necessary.