It's time for me to get new spark plugs. I'm at 93k and I'm misfiring. But it comes and goes and it doesn't throw a code. So I'm starting with the plugs then if it's still misfiring I'm gonna try the coil packs. Hopefully it's nothing too serious. It basically sounds like a mini-cummins. Lol. I do have 115k mile warranty through Carmax if the plugs and coils don't fix the issue.

So my question for you all is what brand plugs are you guys running?

 

^OEM is your best bet!

I also you have an IS250? Have you read about the carbon build-up issue those motors have? Are you experiencing any idling issues and rough running?

 

Sorry I should have specified I have a 350. Idk if I'm paranoid about the misfire coming and going but I do feel like it's idling rough.

 

Sign up for Sewell Lexus' website and receive a discount for CL members when you order the oem plugs. That's what I did and it was much cheaper.

 

I'd start with the new plugs and work from there.