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
1999 Dodge Stratus $140 $69.95 $70.00 21% $177.45
1980 Chevrolet Camaro $121 $51.06 $70.00 23% $158.56
1984 Dodge D250 $103 $33.06 $70.00 26% $140.56
1990 Dodge B150 $102 $31.51 $70.00 26% $139.01
1994 Toyota Corolla $137 $66.54 $70.00 21% $174.04
1989 Chevrolet K2500 $115 $45.37 $70.00 24% $152.87
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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

4.5/5

Number of Reviews

169

Rating Summary
155
5
4
1
4
155
5
4
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4

James

28 years of experience
364 reviews
James
28 years of experience
I'm not 100% satisfied with the service because my car is not rolling. I can't say that it's the mechanics fault because it could be that the car is out of fuel do to a fuel odometer failure.other than that I can say that James did a good job and even showed up early.
1975 CHEVROLET MALIBU - DISTRIBUTOR ROTOR AND CAP - COMPTON, CALIFORNIA

David

13 years of experience
339 reviews
David
13 years of experience
David was awesome. He got my car up and running in just a couple of hours.
1995 HONDA CIVIC - DISTRIBUTOR ROTOR AND CAP - TRAVIS AFB, CALIFORNIA

Theodore

13 years of experience
814 reviews
Theodore
13 years of experience
Came over on time and just when i thought the problem wouldnt get solved, Theadore came through and got my car running. He even helped with other repairs on my car within the same day and got it all taken care of.
1998 HONDA CIVIC - DISTRIBUTOR ROTOR AND CAP - SNOHOMISH, WASHINGTON

Robert

28 years of experience
500 reviews
Robert
28 years of experience
Thank you, Robert! My truck was misfiring and at idle it sounded like the pistons were swapping holes. Robert diagnosed it quickly and performed a sort of mini-tune-up for me. Now the truck runs like a top and idles quietly. The best part was Robert's expert service cost me far less than a local shop quoted me with a much faster turn around time. Great service and great attention to detail. Robert even advised me of a couple of future issues but there was no push to "up sell" me on more services.
1999 DODGE RAM 1500 - DISTRIBUTOR ROTOR AND CAP - SUNNYVALE, CALIFORNIA

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