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
2014 Ford E-150 $113 $42.71 $70.00 24% $150.21
2014 GMC Acadia $173 $89.22 $84.00 20% $218.22
2013 Dodge Durango $156 $86.34 $70.00 19% $193.84
2003 BMW 330i $100 $30.18 $70.00 27% $137.68
2008 Mercedes-Benz SL600 $319 $248.68 $70.00 10% $356.18
2004 Jaguar XJ8 $319 $248.68 $70.00 10% $356.18
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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.

distributors
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Recent Distributor Cap and Rotor Replacement reviews

Excellent Rating


YourMechanic Distributor Cap and Rotor Replacement Service

Average Rating

4.4/5

Number of Reviews

164

Rating Summary
150
5
4
1
4
150
5
4
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4

Honorio

16 years of experience
658 reviews
Honorio
16 years of experience
Honorio was very quick in identifying the problem. Next he offered to come even earlier than the appointment to make sure that I have the car running as soon as possible. He also made sure that company got the right parts before coming to next appointment. I definitely recommend Honorio.
1996 HONDA CIVIC - DISTRIBUTOR ROTOR AND CAP - PALO ALTO, CALIFORNIA

Patrick

12 years of experience
254 reviews
Patrick
12 years of experience
Patrick was awesome! We will use him again for sure!
1994 HONDA ACCORD - DISTRIBUTOR ROTOR AND CAP - RICHMOND, VIRGINIA

David

10 years of experience
128 reviews
David
10 years of experience
He diagnosed the issue. I did a great job
1999 NISSAN PATHFINDER - DISTRIBUTOR ROTOR AND CAP - MARIETTA, GEORGIA

Jonathan

19 years of experience
304 reviews
Jonathan
19 years of experience
As always Jonathan was professional and did an awesome job, I would definitely want him working on my van in the future
1978 CHEVROLET G30 - DISTRIBUTOR ROTOR AND CAP - DENVER, COLORADO

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