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Symptoms of Failure of Fuel Lines

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What are fuel lines in your car?
The fuel lines connect all the components of the fuel delivery system. The fuel lines control and adjust the flow of fuel. Typically, a fuel line is an integral part of the fuel delivery system (FDS), and consists of all tubes that come out of the filter neck. It also connects the carbon canister to the fuel tank. All parts of the fuel line are within the engine. The fuel lines synchronize with various other parts of the FDS such as the fuel pump, carburetor, fuel filters and fuel injectors.

It is commonly made of reinforced rubber to prevent bending or twisting of liners.
The following are some of the fuel liners:
1. Nylon
2. Reinforced rubber
3. Steel

Where are the fuel lines located in a vehicle?
The fuel lines are located near the fuel tank, which supplies the fuel to the engine and runs from the bottom of the fuel tank, down the inside of the passage that houses the shifting method, and exits the top of the transmission system.

Symptoms of clogging of fuel lines

  • Trouble starting
    • The fuel lines are part of the fuel delivery system.
    • It’s difficult to start a vehicle when the fuel lines are blocked.
    • If clogging of fuel lines happen, the fuel flows from the fuel tank but does not go to the engine because the fuel lines on the way are clogged.
    • If this happens, the engine usually won’t restart until the blockage is cleared.
  • Smoke
    • Smoke in the car is a sign of a clogged fuel line.
    • When fuel lines are blocked, fuel does not flow properly into the engine;
    • Due to this, the fuel overflows and goes back into the fuel tank.
    • When this happens, fuel could leak and come into contact with an ignition source, such as the engine causing smoke.
    • Smoke in the vehicle can also occur due to some other reasons, such as a worn-out muffler. Therefore, it is not only a symptom of a clogged fuel line.
  • Engine shut down
    • When a fuel line is partly blocked, the fuel can still flow to the engine.
    • This allows the engine to start.
    • If the fuel line allows to pass through little amounts, the fuel could dry up and causing the engine switch off.
    • If the car periodically doesn’t start or if it starts and then shuts off.
    • This is a good sign that you have a clog in the fuel line.
    • Once the problem is identified, just blow off the dust. It will help the fuel flow in right quantity.

These are some of the symptoms of clogged fuel lines.

How to replace a fuel line in your vehicle

  • Firstly, position the drip pan under each fuel line connection to prevent any leakage of fuel.
  • Wear safety glasses while inspecting the damage of fuel lines visually.
  • Use hydraulic jack and jack stands to raise the vehicle to get underneath.
  • Use turning counter clockwise, to loosen the fuel line connections.
  • Allow any leftover fuel to discharge to the drip pan.
  • Disconnect the fuel line female fitting from the male fitting on both of the ends of the fuel line.
  • Remove the fuel line and perform a visual inspection of the entire fuel line.
  • If you find rubbing damage, find the root of the rubbing under the vehicle.
  • Look for stretched or damaged threads that need to be replaced before installing the new line.
  • Install the new fuel line and fit tight, Do not over tighten the fittings, it will cause the threads to stretch.
  • Position the new line so that it conforms to the location of the mounting clamps and end fittings.
  • Do not overtighten the fittings, as this will prevent them from making a good seal.