Skip the auto shop - Our mechanics make house calls

How to Buy a Good Quality Fuel Pump

Fuel is pumped from the gas tank up into the engine, and these handy little devices come in any number of shapes, sizes, and applications imaginable. Each of the three different key types of fuel pumps has a specific purpose: in-tank pumps, external electric pumps and mechanical pumps – and some are much more user-friendly to replace than others.

The simplest design is also the one that has been in use the longest: the mechanical fuel pump. There are only a few moving parts and these are most often used in concert with diesel engines and those that have carburetors instead of fuel injectors. Their power is provided by the crankshaft or camshaft and as the speed increase so does the volume of the fuel being pumped, giving the engine more to “drink” as needed.

  • Electric external fuel pumps, also known as inline fuel pumps, are most often located external to the gas tank inside of the vehicle frame and can be used in a number of ways. They may have an internal fuel pump that comes alongside to help them get the gas quickly during times when the engine needs an extra boost.

  • Electric internal fuel pumps float inside the gas tank, but they can be difficult to reach and replace, especially for the average driver. An internal fuel pump is surrounded by a “sock” that keeps the debris that could be floating in your gas tank from reaching the engine as the gas is being pumped through. Remaining particulates are caught by the fuel filter as gas continues on through the system.

  • Mechanical fuel pumps can be made in a variety of different fashions – so check your owner’s manual or consult a professional before making your purchase.

  • The empty float height and float retention should match the OEM (Original Equipment Manufacturer) specifications to guarantee that the gas gauge reading will be accurate.

  • You want to be sure that the part is validated, matched and tested to the right vehicle application before purchase.

A fuel pump is a critical part of your vehicle’s proper functioning. If you’re hearing sputtering when you try to start your car, suspect that it might not be getting gas to the engine and check your fuel pump.

YourMechanic supplies top-quality fuel pumps to our certified mobile mechanics. We can also install a fuel pump that you've purchased. Click here to get a quote for a fuel pump replacement.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
Icon-warranty_badge-02

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

More related articles

Symptoms of a Bad or Failing Flexible Clutch Hose
Common signs include difficulty shifting, low clutch fluid, and feeling no resistance at the clutch pedal.
P0121 OBD-II Trouble Code: TPS "A" Circuit Range Performance Problem
P0121 code definition Throttle Pedal Position Sensor/Switch (TPS) A Circuit Range Performance Problem What the P0121 code means P0121 is a generic OBD-II code which indicates that the Engine Control...
How to Get a Louisiana Driver's Permit
s licensing program. The first step in this program is to obtain...


Related questions

Q: 2000 Mercury Mystique ocassionally only cranks but couldn't start

Hello. Thank you for writing in about your 2000 Mercury Mystique. There are a couple things here that I recommended having a technician check to diagnose the cause of the the no-start condition. The fuel pressure would have to be...

Q: Moisture in fuse box causes fuel pump fuse malfunction

For this, Silicone spray is one tool I personally like to use especially on rubber or silicone seals. The spray will leave a water-tight film on the electrical component and offers a moisture resistant coating. If you would like to...

Q: Fuel problems with my car.

The most likely cause of this problem would be a weak fuel pump or a clogged fuel filter. I would enlist the help of a YourMechanic technician to check your fuel pressure first. If the fuel pressure is low and...