Exactly how does a fuel pump work?

An auto’s engine burns a mixture of fuel and air to generate energy. Gas is pumped along a pipeline from the tank and mixed with air in the carburettor, where the engine sucks in the mixture. A fuel pump draws gasoline out of the tank with a pipe to the carburettor. The pump might be mechanical functioned by the engine – or it may be electrical, in which case it is typically next to or perhaps inside the fuel tank.

A mechanical fuel pump is powered by the camshaft. As the shaft turns, a cam passes under a rotated lever and forces it up at one end. The other end of the lever goes down and also takes the diaphragm with it. When the lever goes down, it creates suction that draws the gas through the fuel pipe and also into the pump. The diaphragm can move up only by eliminating petroleum from the chamber. The petrol can not go back with the first one-way valve, so it goes out through another one leading to the carburettor. An electric gas pump has the exact same diaphragm-lever plan, however as opposed to the camshaft, a solenoid (an electro-magnetic switch) provides the pull on the diaphragm. The solenoid draws in an iron rod that pulls the diaphragm down, drawing petroleum right into the chamber.

How do I know if my vehicle requires a fuel pump repair work?

The following are some symptoms of a damaged gas pump:

  • Whining noise from the fuel tank.

If you hear a screeching or whining sound coming from the fuel tank while the car or truck is running, there may not be enough fuel, a damaged pump, or a contaminant in the system.

  • Difficulty starting.

Fuel pumps can eventually break and damage with time since they are regularly running whenever the ignition is turned on. A damaged fuel pump can cause the car to take more cranks to start than normal, and in more serious instances might even cause the vehicle to need several turns of the key prior to starting. A weak fuel pump might still pump fuel, but the automobile might experience trouble starting from the absence of stress.

  • Engine sputtering.

If you are driving at a consistently high speed and your engine all of a sudden starts sputtering before returning to normal, this suggests that the fuel pump can not give a consistent stream of fuel to the engine at the ideal pressure.

  • Stalling at high temperatures.

Stalling with a mix of a high inner temperature in your vehicle possibly indicates there is a trouble with your fuel pump’s motor.

  • Loss of power under stress.

If you experience a loss of power when you are driving uphill, carrying a heavy load or even while speeding up, this shows the fuel pump is weakening due to the fact that it can not stay up to date with the greater needs of your car.

  • Car surging.

Irregular resistance inside the fuel pump motor may cause car surging, which indicates a fuel pump in need of repair work. Surging feels like the gas pedal has been used. However, it takes place at a random, consistent speed. If this takes place regularly, it may be as a result of problems within the fuel pump.

  • Reduced gas mileage.

A valve inside the fuel pump might not be opening up, causing even more gas than necessary to put into the engine system which could cause you to fill your vehicle with fuel more often than common.

  • Car will not start.

If the fuel pump fails completely, the car will refuse to start. The engine will certainly still crank when the key is turned, yet it will be incapable to start because of the lack of gas. A no-start situation can also be triggered by a variety of other concerns, so having the automobile properly serviced is very recommended.

If you are experiencing several of these signs and symptoms with your vehicle, you can bring your cars and truck to Oscars Automotive in Boise to get it spruced up.

Your Trusted Shop for Fuel Pump Repair

We at Oscars Automotive in Boise are experts in all things auto repair. We’ve been fixing cars since 2002 and our team has decades of combined experience. Here some of our guiding principles at Oscars Automotive in Boise:

  • Acting with honesty, integrity, and kindness creates an unforgettable experience.
  • Superior training and equipment is in our pursuit of excellence.
  • Seizing the gift of opportunity is our way of paying the highest respect to our benefactors.


To schedule an appointment with Oscars Automotive in Boise, give us a call at (208) 629-8880 or schedule an appointment online.

The Strength of Oscars Automotive

  • ASE-Certified Technicians on Staff
  • Motorsport Waiting Room with Free Wi-Fi
  • Complimentary Uber/Lyft (with signed work order)
  • 3-Year/36,000-Mile Nationwide Warranty Including Roadside Assistance
  • Full Range of Detailing Services
Napa 36
Fuel Pump Repair in Boise, ID

For honest and efficient Fuel Pump Repairs in Boise, ID, turn to the capable team at Oscars Automotive. “Life’s too short to drive boring cars.”

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(208) 629-8880

Our Commitment to You

Whether you're looking for BMW or Mercedes service in Meridian, ID, we've got you covered. In addition to honest and precise work, we at Oscars Automotive strive to create a unique, educational automotive experience for each and every customer. To do this, we make sure we are up to date on all the latest automotive technology and go through the appropriate training to ensure we have all the skills needed to help you. Here are some guiding principles we follow every day in our shop and beyond:

  • Acting with honesty, integrity, and kindness creates an unforgettable experience.
  • Keeping up to date on the latest training and equipment helps fuel our pursuit of excellence.
  • At Oscars Automotive, our desire is to help customers have an informed experience that is to enrich their knowledge on their particular vehicle. We will not only educate you on the services your vehicle needs now, but will also inform you of which services should be performed in the future. By creating an ongoing relationship with our customers, we pay respect to our benefactors and our customers and friends alike will reap the benefits of what we achieve.
  • Growing as individuals and as a business gives us the tools to help others thrive in their life's pursuits.



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