If your fuel filter is clogged, it can make it difficult or impossible to start your car. However, there are a few things you can try to get your car started. First, you can try turning the ignition key to the "on" position for a few seconds to allow the fuel pump to build up pressure. Then, turn the key to the "start" position and see if the engine starts. If this doesn't work, you may need to have your fuel system checked by a professional mechanic.