Lexus LC Combustion Misfires

Alright Lexus LC comrades, I'm wrestling with a perplexing issue on my 2019 gasoline LC. At 184163 km, it's developed combustion misfires. Rough engine running is evident, and the check engine light decided to grace me with its presence. Has anyone else experienced jerking when accelerating, coupled with reduced engine power? Initially, I thought it might be the spark plugs or ignition coils, but could it be something else?

4 comment(s)

I had a similar experience. I remember experiencing rough engine running, and the check engine light lit up like a Christmas tree. Jerking when accelerating and a noticeable drop in power – sound familiar? I also checked the spark plugs and ignition coils but the problem was not there. What was your next step after that?

That's an uncanny resemblance to my situation! I'm curious, did the symptoms appear intermittently, or were they consistently present? Furthermore, did you eventually identify the root cause of the misfires? Did it turn out to be the injectors?

The symptoms were pretty consistent once they started, not intermittent at all. Yes, it ended up being a defective injection valve/injector. I'd suggest getting it checked out by a workshop, as specialized tools may be needed.

Thanks a lot for confirming! I appreciate you sharing your experience. I took it to the workshop, and they confirmed your diagnosis – faulty injector. Repair cost 515€. Replacing the injectors seems to have resolved all the symptoms!

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