Symptoms of a Bad or Failing Distributor Rotor and Cap

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Cost of Replacing a Bad or Failing Distributor Rotor and Cap

Common signs include engine misfires, car not starting, the Check Engine Light coming on, and excessive or unusual engine noises. Our certified technicians can come to you and diagnose the problem. You will receive a $30 credit towards any follow-up repairs that result from the diagnostic. Following are example prices for Distributor Cap and Rotor Replacement. Click on the button below to get an upfront quote for your car.

Cars Estimate Parts Cost Labor Cost Savings Average Dealer Price
2003 Volkswagen Jetta $111 $41.32 $70.00 25% $148.82
2004 Aston Martin DB7 $110 $40.10 $70.00 25% $147.60
2004 Chevrolet Express 3500 $154 $69.56 $84.00 22% $198.56
2008 Cadillac CTS $115 $44.96 $70.00 24% $152.46
2004 Audi A6 Quattro $128 $57.99 $70.00 22% $165.49
2004 Mercedes-Benz S55 AMG $277 $207.24 $70.00 11% $314.74
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How to Diagnose a Bad or Failing Distributor Rotor and Cap?

distributor rotor and cap

A running engine sends a large amount of electricity through the ignition coils to the rotor, which turns inside the distributor. The rotor routes the energy in a specific through the spark plug wires ultimately to the engine’s cylinders in the correct firing order.

The distributor rotor and cap keep the distributor’s contents separate from the engine and keep the distributor’s working parts clean and tidy – while supporting the incredibly high volts of energy and delivering them to the appropriate spark plugs. The spark plugs utilize the spark from the distributor to ignite the fuel mixture, which is what keeps the engine running.

High voltage runs through this entire distributor system during the operation of your vehicle, but if there's an issue this voltage won’t get distributed to the correct spark plugs to ensure that your engine will run. Usually a faulty distributor rotor and cap will produce a few symptoms that alert the driver that service may be required.

1. Engine misfires

Engine misfires can occur for a number of reasons. Checking your distributor rotor and cap to see if they need to be replaced is one way to ensure that everything is in solid working order.

2. Car doesn’t start

When the distributor cap isn’t on tightly or is malfunctioning, the engine is unable to send the spark through the entire circuit required to move the cylinders – which ultimately make the car run.

3. Check Engine Light comes on

Your Check Engine light can mean a number of different things, but when you see this light on along with some of the other symptoms listed here, it’s time to call a professional to see what the code is from your car’s computer.

4. Excessive or unusual engine noises

Your vehicle may make some very strange noises if the distributor rotor and cap are malfunctioning – specifically because the cylinders will try to fire but fail. You might hear a tapping, clicking, or sputtering sound when the distributor rotor and cap are failing.

Any time you have routine service performed on your vehicle, ask that the ignition system be checked for defects or problems. If you experience any trouble starting your car get assistance from a qualified mobile automotive technician from YourMechanic.

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Recent Distributor Cap and Rotor Replacement reviews

Excellent Rating


YourMechanic Distributor Cap and Rotor Replacement Service

Average Rating

4.8/5

Number of Reviews

149

Rating Summary
136
4
4
1
4
136
4
4
1
4

James

27 years of experience
270 reviews
James
27 years of experience
Superb service!!! I highly recommend James too. He was extremely knowledgeable and friendly. I will book him again.
1999 JEEP WRANGLER - DISTRIBUTOR ROTOR AND CAP - WINDERMERE, FLORIDA

Jasmine

20 years of experience
28 reviews
Jasmine
20 years of experience
jasmine was very efficient in doing the work and had good past experience that helped the service go smoothly.
1996 CHEVROLET ASTRO - DISTRIBUTOR CAP AND ROTOR REPLACEMENT - MILWAUKEE, WISCONSIN

Alex

13 years of experience
382 reviews
Alex
13 years of experience
very polite, honest and quick. It was a pleasure to have Alex fix my truck. I really dont know what else to say. He was great.
1999 CHEVROLET EXPRESS 3500 - DISTRIBUTOR ROTOR AND CAP - FLOWER MOUND, TEXAS

Ruben

20 years of experience
35 reviews
Ruben
20 years of experience
Great experience, very professional and knowledgeable. Answered all questions and concerns. Also, Ruben is a good guy and it was a pleasure meeting him. I will use this service again.
2002 DODGE DAKOTA - DISTRIBUTOR CAP AND ROTOR REPLACEMENT - SANTA CLARA, CALIFORNIA

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