We've all been there: the gas light comes on, and we think we can go a little further before refueling. But is pushing your car to the limit on an empty tank really harmless, or could it spell disaster for your fuel pump? While skipping the gas station might seem like a minor convenience, it’s important to understand what’s happening under the hood when you’re running on fumes.
How the Fuel Pump Works
Located inside your vehicle’s gas tank, the fuel pump is responsible for moving fuel from the tank to the engine. This process ensures that your car has the fuel it needs to start and keep running. The pump operates at high pressure, which helps deliver the right amount of fuel through the lines to your engine’s fuel injectors.
Most modern cars use an electric fuel pump, which is cooled and lubricated by the gasoline in the tank. Here’s where running low on gas becomes a problem: when you drive on empty, there’s less fuel available to keep the pump cool and lubricated. Over time, this lack of cooling can lead to premature wear and even failure of the fuel pump.
The Dangers of Running on Empty
So, what’s the worst that could happen if you frequently drive on empty? It turns out, quite a bit. Below are some potential risks:
Fuel Pump Overheating
As mentioned earlier, your fuel pump relies on gasoline to stay cool. When the gas level drops too low, the pump may overheat. This can cause serious damage over time, leading to expensive repairs or even a complete fuel pump failure.
Sediment Buildup
Fuel tanks can accumulate dirt and debris over time. Normally, these contaminants settle at the bottom of the tank, where they remain harmless. However, when you drive on empty, the pump can start pulling fuel from the bottom of the tank, potentially drawing in sediment that could clog fuel lines or damage the pump.
Air in the Fuel Lines
Running out of gas can introduce air into your vehicle’s fuel lines, which disrupts the fuel flow and can make it difficult for your engine to start once you refill the tank. In some cases, getting the car running again may require priming the pump, a process that can be a headache on its own.
Does It Always Ruin the Fuel Pump
Not necessarily, but it’s a gamble. Occasionally, running low on gas may not immediately damage your fuel pump, but making it a habit increases the likelihood of premature wear and eventual failure. It’s also worth considering that modern fuel pumps are designed to withstand some stress, but they aren’t invincible. Avoiding prolonged periods of driving on empty is a smart move for your car’s longevity.
Preventative maintenance and being mindful of your fuel levels are key. While a single instance of running low on gas might not spell disaster, repeated behavior increases the risk that your fuel pump will give out sooner than expected.
How to Avoid Fuel Pump Damage
Maintaining good fuel habits is one of the easiest ways to keep your fuel pump in good working condition. Here are a few tips to avoid unnecessary damage to your pump:
Refuel Before the Warning Light
Make it a habit to refuel when your gas gauge reaches a quarter tank. This ensures there’s always enough fuel in the tank to keep the pump properly lubricated and cooled.
Regular Maintenance
Keep your fuel system clean by using fuel system cleaners as recommended by your vehicle’s manufacturer. Regular fuel system inspections should be performed to catch any potential problems early.
Pay Attention to Fuel Filters
Sediment buildup can be avoided by changing your fuel filter regularly. The filter helps keep contaminants from reaching the fuel injectors and pump, further reducing the risk of damage.
Plan Ahead
If you know you’ll be driving long distances, plan your fuel stops in advance to avoid getting stuck in a situation where you have to run on empty.
What to Do If You Run Out of Gas
Let’s say you’ve found yourself in a situation where your car has run out of gas, and the fuel pump might already be affected. First, don’t panic. Once you’ve refueled, it’s a good idea to take it easy on your vehicle for a little while. Avoid sudden acceleration and give the fuel system time to recover. Suppose your car continues to have trouble starting or you notice unusual behavior (like sputtering or hesitation). In that case, it might be time for a professional to check the fuel pump.
Worried about the impact driving on empty might have on your fuel pump? Let the experts at Autoworks Of Issaquah take care of it! Schedule an inspection today and give your car the attention it deserves.