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Kent: Could Bad Spark Plugs Cause a Rough Idle in Your 2018 Nissan Sentra?
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(Posted on Jan 16, 2019 at 08:27PM by Robert Bacon)

Hi Robert,

Iâ€™ve noticed my 2018 Nissan Sentra has a rough idle. My friend said that worn out spark plugs could be the problem: is he correct?

Thanks,
Andrew

Hi, Andrew!

If you have worn out spark plugs in your 2018 Nissan Sentra, they could cause a rough idle - Iâ€™ll explain why.

Spark plugs ignite the air and fuel mixture in your vehicleâ€™s cylinders. When they are working properly, the combustion rate is constant and that keeps your carâ€™s idle steady.

Once your plugs deteriorate, they canâ€™t ignite the gas and air as efficiently or consistently. So, when this mixture combusts, it will cause your Sentra's idle to rise and fall.

Unfortunately, a rough idle can be caused by lots of different problems: a broken vacuum hose or a clogged filter could also produce this issue. There is really no way for me to give an accurate assessment of your vehicle without inspecting it.

My advice is to call into our Service Department and let the Technicians have a look at your car.

Thanks for the question, Andrew! Contact Kirkland Nissan, Washington again if you need anything else.