A bad fuel filter can cause a car to start up with difficulty or not start at all, and it can also cause a car to hesitate or stall while driving, especially when going uphill or under a heavy load. This is because the fuel filter is responsible for removing dirt, debris, and water from the fuel before it is sent to the engine. When the fuel filter is clogged, it can restrict the flow of fuel to the engine, which can cause a variety of problems, including starting difficulties, stalling, and hesitation.
In addition, a bad fuel filter can also cause a car to run rich, which can lead to increased fuel consumption and emissions. If you suspect that you may have a bad fuel filter, it is important to have it replaced as soon as possible to avoid further problems.
