Asked by: Sherrell Gasfort
asked in category: General Last Updated: 4th February, 2020

Can a bad coil ruin a spark plug?

Yes. Bad ignition coils can damage and or cause spark plugs to degrade prematurely.

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Subsequently, one may also ask, can a bad coil foul a plug?

Continuing to drive with bad ignition coils can damage other parts, including the catalytic converter. Since a faulty ignition coil causes a misfire, it will also cause the related spark plugs to foul. Always replace the spark plug or plugs that the bad coil was firing. This will restore the power and fuel economy.

One may also ask, do ignition coils replace spark plugs? The most common component to replace in conjunction with the ignition coils are the spark plugs. Worn spark plugs can cause unnecessary load on the coils and there is often some overlap in the labor required to replace both components.

Similarly, what happens when an ignition coil goes bad?

One of the most common symptoms associated with a faulty ignition coil is engine performance issues. Faulty coils may cause the vehicle to experience misfires, a rough idle, a loss in power and acceleration, and a reduction in gas mileage. In some cases the performance issues may even result in the vehicle stalling.

How long can I drive with a bad ignition coil?

The answer is you should not. You can drive the car until it breaks down completely (and it will). While doing so you will, as pointed out by other answers, run the risk of damaging the converter but you also run the risk of fire. If the coil is faulty very bad things can happen.

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