If the fuel filter is bad will car not start?

Yes, a clogged or dirty fuel filter can prevent a car from starting. The fuel filter is responsible for removing contaminants and debris from the fuel, so it is crucial for the engine to receive a clean fuel supply. If the fuel filter is clogged, the fuel will not be able to flow properly, which can cause the engine to hesitate, stall or not start at all. Additionally, a clogged fuel filter can also reduce fuel pressure, which can cause a car to run poorly and eventually lead to engine damage. Therefore, it is crucial to replace fuel filters, as per the vehicle manufacturer's recommendations.