What Causes Fuel Lines To Fail?

At times, fuel lines can seemingly fail with little to no warning. One day everything seems fine, and then the next, you smell fuel, and your vehicle won't start. You probably don't think about your fuel lines or check them unless you're replacing a fuel filter. But they may eventually wear out and need to be replaced.

There are a lot of things that can cause fuel lines to fail, but generally, those problems fall into the following categories:

• •Corrosion from winter weather
• •Age and wear
• •Poor quality
• •Contaminants

Let's look at each of these issues in more detail.

Corrosion From Winter Weather

Cold weather can cause two types of issues with your fuel lines, both of which are moisture related. The most common problem is corrosion due to moisture and road salt exposure, causing your fuel line to rust through. The other issue is that moisture can build up inside the fuel tank due to condensation, and additives like ethanol absorb water. This type of moisture buildup can cause your fuel lines to rust or, if it's cold enough, can cause the moisture to freeze inside your fuel line.

You can't do anything about winter weather except keep your car clean and avoid driving it when the roads are covered in salt. However, by using a fuel additive to prevent moisture buildup, you can protect your fuel system from moisture.

Age And Wear

Age and wear are other common factors that cause fuel lines to fail. Rubber fuel lines eventually get brittle and crack with age. Metal lines can corrode over time due to exposure to moisture. Even the wear and tear from driving your car or truck can eventually wear out the fuel lines due to vibrations and going over bumps or other obstacles.

Off-road vehicles are especially tough on fuel lines for this reason. The jolts from going over rocks and bumps, as well as hitting obstacles, can damage them or jar them loose. High-centering your vehicle can damage a fuel line, causing it to collapse or break. Wheels can kick up rocks or other debris, which can also cause damage.

Poor Quality

Some fuel lines are made of poor-quality materials, which causes them to wear out sooner. Likewise, poor installation also takes its toll. A poorly installed fuel line can leak or be crimped or won't stay connected. Fuel lines are designed to hold pressure, especially in modern vehicles with highly pressurized fuel injection systems. If there are any leaks or damage, it will affect the fuel flow, leading to an inoperable or poorly performing vehicle.

Contaminants

In addition to water, your fuel system picks up grit and contaminants. Over time, these contaminants can build up and clog your fuel filter and your fuel line. Using a fuel additive with detergents or a top tier fuel from a major brand has been shown to help maintain performance and reduce fuel-related issues.

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