Hey scotty, this has been bugging me for a few months. Car has a rough idle when warm and ONLY when the start-stop thingy is off. Had a tester put on it, seems that the admission valve is sitting at 0.57% lower than it should, reducing the idle rpm to 550 rpms roughly. Have taken the valve off, cleaned it (very little residue on it) but to no avail. No vacuum leaks, no air intake issues (false air being sucked in). No idea why a japanese petrol engine with less than 60k miles would behave like this. Your input would be fantastic. Spoke to the dealership and they quoted me around 350 bucks just for troubleshooting. That's just outrageous in my opinion.

Do apologize for the grammar mistakes, not a native speaker. Fan of yours from Eastern Europe.

Many thanks

Alin