Yes, they have a lot of buildup and deposits. Make sure you get that exact spark plug again same brand everything don't put anything other than the NGK that originally came with
Fairly easy to do,ive seen this plugs go past 150k honda tech here.
I changed my coils and spark plugs and it fixed this same issue
Factory plugs were causing the auto transmision to take longer to shift and jerk more suprisingly. I assume because the engine was acting differently than the transmission expected.
I have a 2012 Civic LX (purchased new) and replaced the original spark plugs at 100k miles with **Denso 3483 (DXU22HCR-D11S)**—which were listed as compatible on RockAuto at the time. I’ve had great results and am now at 200k miles, looking to replace them with the same.
Make sure you get NGKs: FA/FB/EJ/Etc. love those the most.
Just replaced all my spark plugs that were in for 83k miles. Autolites were in and replaced with Denso twin-tip.
If it didn't misfire until you put plugs in it I would suspect the plugs are the cause.
My s2000 ate the Bosch plugs I put in, which were rated for the car/f20.
I used that set of plugs with gaps 0.028 and remained stock for few months. I kept running hk plugs on day to day and it was really not good for stock tune daily use. Car felt sluggish at regular driving. I realized those were 2 step colder plugs and requires a tune or else you won't generate enough boost on daily driving.
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