Just for sharing.
Mine 2008 Honda City Vtec also encounter same issue, since mileage about 60,000km. Now my car clock about 94,000km.
When stop at traffic light - D mode, + pressing brake + aircond ON / OFF (usually morning / after work, car cool down for few hours), rpm suddenly drop from to about 300rpm...then it hit back up to about 1000rpm again as normal...this occur several time directly (about 5~6 jerking). If quickly shift from D to N, jerking stop.
This issue not occur every time when stop....but almost one / two day sure will got. In worst case, if heavy traffic jam - stop - go - stop -go...car will slightly jerk forward, but engine not dead.
I have send my car to Honda Kulim & Sungai Petani.
Honda Kulim technician not able to detect the jerking when test drive....
AT Honda Kulim, i have done the following but jerking not solve:
-- check EGR Valve (first trial)
-- clean throttle body (together with check EGR Valve)
-- flushing A/T gear box (2nd trial about 70,000km)
-- change spark plug (recently about 90,000km)
This of course include those normal service such as change A/T oil as per Honda service interval (about every 20,000km if not mistaken, and service Air Cond every 25,000km).
So recently i have send to Honda Sungai Petani, drop my car there for almost 2 weeks. After car overnight there, technician next morning when test drive so luckily detected the above said jerking issue when stop at traffic light. They did the following:
-- clean throttle body (said problem solve..... but when i test still jerking..so car have to leave there.... this of course not charging any cost since problem not solve, the throttle body is not the root cause).
-- adjust lifting and check using Honda module (not sure what is that, some sort of computer i think), BUT problem remain, still got jerking after i collect the car one week later from service center. So car have to quarantine again.
-- final rectification: CLEAN AIR INTAKE MANIFOLD. Technician said inside air intake manifold got lots of carbon accumulate, they even have to use some sand paper to remove it. Normal carbon cleaning is only at throttle body, cleaning air intake manifold he said require a bit more work. If throttle body cleaning not successful, air intake manifold should then be cleaned.
So, after car drop at Honda Sungai Petani for almost 2 weeks, finally yesterday i collect my car. And the whole day i drive and stop and drive, so far (touch wood), the jerking issue is no more. I will monitor it again, hopefully this will completely solve. I keep reminding them that don't simply change the thing without properly knowing the root cause, as i have did many in Honda Kulim but problem still persist. But of course Honda Kulim got require my permission when they want to / suggest the change.
I have search thru the website, LOWYAT, AUTOWORD FORUM, TEAMCITY...mostly said change flywheel, or worst case is gearbox. I got mentioned this FLYWHEEL to technician, they said if change flywheel they have to take out the gearbox....so normally will not do this first....unless the flywheel got sound....then only will do it.
So, for those who having the same issue, you guys may take this as a reference, maybe clean your air intake manifold. Cost about RM100.
Hopefully not up to changing flywheel or gearbox (if these are the root cause). Hope this help, and touch wood my city jerking not repeat anymore...will monitor and update later.