How Much Does a Cylinder Misfire Cost?

 

A cylinder misfire can happen for various reasons, and when it happens, it generally causes the car to run rough, jerk or buck.

With every spark plug electronically timed to fire at an exact instant to deliver the engine’s specified output, one slight change can cause this so-called “misfire.”

Repairing a misfire isn’t as straightforward as other car repairs as the problem can be due to a variety of reasons, including worn out spark plugs, a vacuum leak or worn valve seals, for example.

If your engine were to misfire, it’s important to bring it to a mechanic as soon as possible, as the problem will worsen over time, often damaging the internal components of the vehicle.

smoke em if you got em by frankieleon, on Flickr
smoke em if you got em” (CC BY 2.0) by frankieleon

How much does a cylinder misfire repair cost?

What May Cause the Engine MisfireAverage Estimate
Bad fuel delivery$200 to $1,000 or more, depending on the reason for the bad fuel delivery
Bad spark plug wires$100 to $300
Broken piston rings$1,500 to $3,000
Broken valve springs$450 to $650
Carbon or oil-fouled spark plugs$100 to $250, depending on the costs of the plugs and local labor rates
Faulty ignition coil$150 to $250
Fuel injector$275 to $400
Vacuum leak$200 to $800

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Engine misfire causes

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