How Long Does an Accelerator Pump Last?

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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.


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Michael

15 years of experience
518 reviews
Michael
15 years of experience
Mercedes-Benz GL450 - Brake Pads Replacement (Rear) - Atlanta, Georgia
Micheal was punctual and friendly. Work was completed within promised time. Will definitely use again.
Volvo S80 - Brake Pads Replacement (Front) - Roswell, Georgia
Michael was SUPER QUICK with doing my brake and rotors. Great communication throughout the whole process. Will always recommend

Kenneth

19 years of experience
509 reviews
Kenneth
19 years of experience
Toyota Sequoia - Brake Pads Replacement (Front) - Newport Beach, California
Kenneth did a great job and very knowledgeable. He has a great attitude and I will for sure be using him again.

Chuy

13 years of experience
129 reviews
Chuy
13 years of experience
Honda Civic - Brake Pads Replacement (Front, Rear) - Cicero, Illinois
Excellent work on doing the breaks for my car and the break and steering system flush I’ll definitely recommend and take into consideration for chuy’s work whenever I need a fix on my car

Richard

16 years of experience
72 reviews
Richard
16 years of experience
BMW 328i - Brake Pads Replacement (Rear) - Dublin, California
Richard was an outstanding mechanic. After he arrived, the first thing he did after taking the initial pictures of the car is an assessment into what work was asked. He quickly verified that I did not need brake fluid and my front brakes even-though it affects his personal commitments and time, which I think is highly appreciate and thorough professional. He was detailed oriented - took time to make sure that all the issue are fixed. He paid attention to detail in overall car assessment- he goes above and beyond. He was also teaching me through the process which I found highly educational and appreciate him providing the information ensuring and making me comfortable what he was doing and explaining patiently all the questions that was thrown at him. When he works - you know he's highly skilled and experienced and knows his stuff. He is highly experienced. He is a "Master" mechanic in true sense :)

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