I got a CEL that goes on and off too

 

I would start with Installation and gaskets (including donuts if your after market system is reusing your donut oems) and applying enough sealant. I had same issue for months just to rediscover that initial installer didn’t put the donut oems…problem gone…

 

I did the burnout trying to figure out the LC. Didn’t work and tires lit up. I never got it to work correctly. Glad to see the car being put to good use!

 

Yeah it was bought used and the gaskets already had some use. I replaced the front gaskets with 3" grimmspeed gaskets but the rear ones are the old 2.75" gaskets. Front should be fine but maybe the sealant didn't hold up. I'm waiting on some new 2.75" gaskets for the rear to arrive before handling it. Also got a spare set of grimmspeeds on the way for the front just in case it's necessary.

Mostly waiting on coilovers to setup the car further at this point. They were shipped earlier this week delivery date seems to be ~Sep 7th according to Fedex.

 

You only have 3 seconds after you push the gas pedal down to the floor and if you don't release the brake within 3 seconds, the launch control disengages and you will end up doing a burn out.

 

Well, I fixed exhaust issue myself and coilovers arrived. I was experiencing a very rough ride lately with the rear end being extremely bouncy, as if the car was constantly in it's stiffest setting through all drive modes, probably even stiffer than what Sports S+ should be. While I was attempting 2016 ECU swap I took the opportunity to run a health check with TechStream and got a nice C1734 error code on the active suspension ECU for the rear left shock dampening circuit. Current through that circuit should be 1400mA but reads 40mA. I brought the car to the dealership this morning since it's still under warranty and they are replacing the rear-left shock free of charge. Will be able to perform mods afterwards.

 

I remember a thread back from a few years ago when someone with a 2017 RCF AVS experienced the same issue. The dampers even in non-SPORT+ mode became very stiff. The Lexus dealership had to do a re-calibration for the owner and it fixed the issue. Cannot find that thread, but I remember reading and following that thread.

Edit: found the thread. Here it is

Anyone had this suspension issue? - ClubLexus - Lexus Forum Discussion

 

Yup I've googled and found that thread when diagnosing the issue! Thanks for pointing it out. Warranty is covering it regardless so all is good. I just wanted to be sure that system is good to go before putting in modified suspension as if I ever decide to sell the car I want to be able to return it to stock or give the new owner a working stock setup.

 

This made me giggle, I looked at the car's service history on the Lexus owners website this morning to find that the 2nd owner of the car, who owned it for about 2 months seemed unhappy with the carbon ceramic brakes. Seems like they didn't know what they were getting into. They parted ways with the car seemingly after that second "service".

 

Swapping to the 2016 ECU made launch control map to "SNOW" Mode which my car doesn't have... But it has the light in the instrument cluster for it! We also could never get rid of an ECM/PCM communication error code thrown by the TCM module. Other symptoms were unavailability of drive mode selection, TRAC OFF light persistently on in the dash. Engine ran but unsure if transmission would've shifted as expected so I didn't move the car in this state.

 

I'm curious if any of you folks have experience or suggestions regarding brake pad options for the carbon ceramic brakes on the track edition. OEM set is about $1800 for front and back. I wonder what the Brembo internal part number for them is or how to find out. Ideally I wouldn't pay stealership price for each set.

 

I have heard the standard RCF brakes are much cheaper if sourced from Brembo directly. Lexus has a markup (of course, they have Lexus badges on them). I suspect, the carbon ceramics mght be cheaper directly from Brembo as well. Did you try checking the Brembo site?

 

I checked and it seems they only have the option to select the “base” RC-F on their website. I inquired with their customer support and waiting on a response.

 

I thought Carbon Ceramics were supposed to last for a looong amount of time, 100k+ miles? Or was it the just the rotors and not the pads?

 

Just the rotors not the pads