Repair 7

How to Check If My Fuel Filter Is Bad

The fuel delivery system is a vital part of your vehicles operation. Within this system, the fuel filter is a component that allows your vehicle to run smoothly. Fuel filters remove any particles from the fuel, such as dirt or rust, that may cause damage to the fuel injector, carburetor or engine. There are a few simple things that you can check if you suspect that your fuel filter is bad and needs replacement.

Instructions

1

Turn the engine off before trying to determine if the fuel filter is bad on your vehicle. You may have to work beneath the car, so allow plenty of space in a safe area for working.

2

Locate the fuel filter. Read the vehicles owners manual to determine if the fuel filter is under the hood or underneath the car. Some fuel filters are connected to the fuel delivery system, whereas some are along the the fuel line beneath the vehicle.

3

Inspect the area around the fuel filter for any obvious damage or problems. If no damage is seen, remove the fuel filter from the fueling system. In most cases, a wrench or similar tool is needed to loosen the bolts that secure the filter. If the filter is underneath the car, you may need additional tools to release the fuel filter.

4

Look at the filter closely. Note that it has a hole on both sides. Remove anything that may obstruct fuel from passing through the holes.

5

Blow through the filter. If the air passes through easily, the filter is still good. If there is a lot of resistance or you have difficulty blowing through it, the filter may be old and clogged and may need to be replaced.

6

Replace the fuel filter and tighten the bolts that secure it in the fueling system. Call a professional mechanic if you are still unsure about the quality or effectiveness of your fuel filter.