How Does a Distributor Work? | YourMechanic Advice

How Does a Distributor Work?

In older cars, a distributor is one of the central parts of the ignition system. Since the early 1990's, many automakers have moved to using ignition systems without distributors. Though the number of cars with distributors has declined over the years, there are still quite a few on the road.

What is a distributor?

The distributor is responsible for getting the electrical charges needed for combustion within the engine out to each of the cylinders. The coil (outside the distributor) creates the very strong electrical charge needed for this process. Inside the distributor, a rotor spins in time with the car’s camshaft, transferring that charge to designated contacts (one per cylinder). As the rotor spins, it passes very close to each contact and the charge jumps from the rotor to the contacts, and then into the wires and plugs.

If you have an older vehicle, your distributor also has breaker points built into it. The purpose of these points is to ground the incoming current and facilitate the pulses of electricity getting to the proper cylinders. A cam from the distributor connects with each point in turn, breaking the ground on the coil, which opens the path for the electric charge to come through.


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Bryant

11 years of experience
407 reviews
Bryant
11 years of experience
Ford Fusion - Brake Pads Replacement (Front, Rear) - Indianapolis, Indiana
Bryant has done great work on my car before, the latest work is no exception. He's very flexible, and goes the extra mile to get you back on the road.
Scion iA - Brake Pads Replacement (Front) - Carmel, Indiana
This is my first time using this service. I am very happy with it. Bryant was very knowledgeable and did quality work. I will use this service more regularly.

Augustine

11 years of experience
57 reviews
Augustine
11 years of experience
Volkswagen Passat - Brake Pads Replacement (Front, Rear) - Albuquerque, New Mexico
He’s amazing! Did a wonderful job on my brakes and was extremely knowledgeable, and a real fun guy to be around as well!

Jimmi

25 years of experience
68 reviews
Jimmi
25 years of experience
Mazda CX-9 - Brake Pads Replacement (Rear) - Orlando, Florida
Jimmi was wonderful. He was on time, knowledgeable, and completed work in a timely manner. He went above and beyond with helpful tips and recommendations. We will be using him for all our family vehicles.

Robert

3 years of experience
4 reviews
Robert
3 years of experience
Toyota RAV4 - Brake Pads Replacement (Rear) - Tacoma, Washington
Came right on time! Had all the necessary tools to finish the job. After the test drive, he gave me an update on my car. Topped off my fluids and disinfect the inside. Well recommend!!

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