Skip the auto shop - Our mechanics make house calls
  1. Home
  2. Articles
  3. How Long Does an Accelerator Pump Last?

How Long Does an Accelerator Pump Last?

accelerator pump

If you drive a newer vehicle, you may not be familiar with accelerator pumps. New vehicles almost invariably operate on a system of fuel injection, and the accelerator pump is a component of carbureted cars. In a carbureted vehicle, the accelerator pump works to regulate the flow of fuel that is supplied to the carburetor, increasing and decreasing it as needed. As you press down on the gas pedal, the accelerator pump works to deliver more fuel, resulting in smooth acceleration. It works along with the vacuum distributor, which is a timing device.

If you drive a carbureted vehicle, you use your accelerator pump many times, every time that you drive. Eventually, if you drive long enough and frequently enough, the accelerator pump will begin to show signs of wear. Usually, it is replaced in conjunction with rebuilding the carburetor. Very rarely, the pump may fail prematurely. Given the variables involved, it is not possible to say with certainty how long your accelerator pump will last, but it could very well last you the life of your car.

Signs that your accelerator pump may need to be replaced include:

  • Car does not accelerate smoothly when gas pedal is pressed hard (note: a bad accelerator pump does not affect slow acceleration, only fast acceleration)
  • Engine stalls or stutters during hard acceleration
  • Exhaust smoke

Poor acceleration can be dangerous if you need to pass, merge, or perform other operations where you need to be assured that your car can accelerate quickly. If you think that your accelerator pump is failing, you need to have it checked out by a professional mechanic. An experienced mechanic can diagnose your acceleration problems and, if necessary, replace the accelerator pump.

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

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
How to Transfer a Car Title in Idaho
In order to prove ownership of a car, you must have the title. However, when a car is sold, given away or inherited, the title needs...
Veteran and Military Driver Laws and Benefits in New Mexico
The state of New Mexico offers a number of benefits and perks for those Americans who have either served in an Armed Forces branch...

Related questions

Q: Carburetor installation costs and adjustment.

Billing question sent to CS for installing and adjusting cost of a carburetor.

Q: My '65 F-100 lurches only when driven slowly.

Hi there. The symptoms that you are describing lead to the accelerator pump in the carburetor not pumping correctly at low rpm's and low speeds. Try adjusting the carburetor settings to be 100 rpm's higher and turn in the fuel...

Q: Q: car cranks but doesn't start

This engine will most likely have the old style ignition points and condenser. This type of ignition needs to be replaced every year or 12,000 miles or you will end up having no starts, hard starts or the engine may...