Good day to you all, I have three problems on 2011LS I hope to find some one have experience with them here
-When the AC on and the car stop the idle go from like 700 to 800 and it’s keep going forward and backward
-also when the gear on the 4th i feel like very little missfier and it’s only on this gear
-comparing to another cars I feel like I need much more power to push on the break paddle to keep the car on stop position, on slowing down there is no problem the problem only to keep it stop

first two i replace spark plugs, air filter, clean injectors, check another throttel body and no progress
for break issue I flush break fluid also no progress

 

Do you have any error codes?

 

AC idle sounds normal as the compressor clutch goes on and off.
Check for codes for transmission. It's possible the transmission just needs to have programming reset.
Brake system could have issues with accumulator. It's a potential issue in the LS.
Also possible that brakes weren't bled using Techstream software. This can cause problems as LS brakes don't bleed properly without using software.

 

 

https://gofile.io/d/WUOwmK

Is this idle behavior normal on LS ?

 

There are no engine related codes... Did you clean the MAF sensors? You have Techstream, you should try to monitor behavior of throttle body, timing, O2 sensors.

 

That idle looks normal to me. If you have the seat coolers / heaters turned on the elements can cycle on and off. Higher idle is likely the alternator keeping up with demand. If you really think there is an issue I would start by cleaning the maf sensors like Anfanger recommended. They could be to blame for your misfire too. I suspect a bad / weak 12v battery may be to blame for the idle.

Since you have techstream. The misfire can be narrowed down to exactly which cylinder. While running techstream go to this screen and attempt to reproduce the speed where you feel the misfire. If you are having misfires they will show up while your driving under the "current monitor" screen. I don't remember if you click on misfire details or summery but it's one of them. If you shut the car off before hooking up techsteam the smaller misfires aren't always saved. Make sure to scroll down to check all the cylinders. There are a few more pictures here.
https://www.clublexus.com/forums/ls-...l#post11339636