Ok guys so my cars idle drops to 500rpm and under starts to shake and lights flicker and almost turn off the car did this Befor. Called the dealer they said valve springs got it done they said they didn't see any carbon build up. So this time I got it on video tell me what you guys think.

Note when I put regular fuel one time I got a check vsc and Check engine light TsC light on. Code came up as o2 sensor put super a day later lights were off and i didn't reset the car.
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I hope one of the links will work

 

Links don't work. :P

 

Just saw the video and it is weird! Take it back to the dealership and show them the video!

 

You should see how it drives I'll be going just fine and when I let out the rpm falls to like 200rmp and shakes a little and it smells like gas. And befor this I would have it WOT and right Befor it shifts it makes a weird noise like if the gear slips and then grabs

 

cant see the video....link is not working..

 

go backto dealer, something went wrong. the valve timing might be off a tooth or vacuum hose off