OEM 3UZ ECU TUNE/FLASH

V86

New Member
Hi All,

So I have been doing some research regarding the OEM lexus 3uz/1uz vvti ecus which are OBD2 compatible. Many claim that tuning the oem ecu via OBD2 is impossible(well all info online is dated pre-2010 anyway). There are actually multiple tuning interfaces that have cracked the Lexus/Toyota ecu encryption. Dimsport offer off the shelf tunes, however custom tuning is possible if your tuner is familiar with Dimsport. Ktag is also a popular interface and any competent tuner should be able to custom tune with it.

1. Dimsport ( https://www.dimsport.it/en/applications-list/unique/auto/lexus/gs-s430/gs-430-43l-v8-224kw300hp-denso/ )
2. Kess/Ktag ( http://ecutechnologies.co.za/2017/06/k-suite-2-31-update/ )
3. Are there any others that you know of??

I know many of you are old-timers who don't like learning new things because... ''I have been building 1uz motors for 10+ years bla bla bla'' but guess what, its 2019, technology is on another level. If anyone has gone down this route please share some info for the people out there.

Thanks Mense,
 

ChopsLS430

New Member
I have been thinking the same thing for a while now since I've owned my '01 LS430. Everything I read on the "typical" Lexus forums all date back 8 to 15 years ago where everyone says it's impossible to crack and tune these ECU's. Considering when these cars were new, probably 99% of the owners were older and could care less about performance and whatnot with these cars, which makes sense. So there was never any kind of demand for performance parts and tuning for these cars, until now that they are a lot more affordable and are well out of warranty.

Now that I've sold my '16 370z and took it off of my insurance, I've freed up over $700 a month in bills, not to mention a new, better paying job on top of it all.

We all know these engines have loads of potential in stock form, and with a few breathing mods and a decent tune, we should be able to get possibly another 30-40 hp out of them I would imagine, if not more. It all depends really on how de-tuned Lexus made these motors. Plus, if ECU tuning is now possible, that means the transmissions should be tunable as well, changing shift points and all, maybe even able to control the torque converter as well.

Mind you, I don't plan on turning this car into a sports car, but I wouldn't mind getting into the same league as the older Merc AMG's and M-Series BMW's from the late 90's, early 2000's. Likewise with the suspension and wheels. No air bags, no huge 20" wheels, no VIP, none of that. Just a nice muscular-ish look and stance like the M's and AMG's that I mentioned above.

If you have heard of or found any more info (or anyone else on here for that matter), please let me know. After six months of owning this car, I want to finally start fixing it up other than the ceramic window tint, JDM Celsior tail lights and muffler delete that I've done so far.

Many thanks in advance, and Merry Christmas!





With my brother's '18 Alfa Giulia...
 

ChopsLS430

New Member
I emailed someone as well and waiting to hear back from them. They do everything, and I do mean everything car related, from simple oil changes to full-on engine swaps. You name it, they do it, and probably have the resources to pull off something like ECU tuning for our cars. I'll let you know when I hear something back from them.
 

V86

New Member
Hi
I have been thinking the same thing for a while now since I've owned my '01 LS430. Everything I read on the "typical" Lexus forums all date back 8 to 15 years ago where everyone says it's impossible to crack and tune these ECU's. Considering when these cars were new, probably 99% of the owners were older and could care less about performance and whatnot with these cars, which makes sense. So there was never any kind of demand for performance parts and tuning for these cars, until now that they are a lot more affordable and are well out of warranty.

Now that I've sold my '16 370z and took it off of my insurance, I've freed up over $700 a month in bills, not to mention a new, better paying job on top of it all.

We all know these engines have loads of potential in stock form, and with a few breathing mods and a decent tune, we should be able to get possibly another 30-40 hp out of them I would imagine, if not more. It all depends really on how de-tuned Lexus made these motors. Plus, if ECU tuning is now possible, that means the transmissions should be tunable as well, changing shift points and all, maybe even able to control the torque converter as well.

Mind you, I don't plan on turning this car into a sports car, but I wouldn't mind getting into the same league as the older Merc AMG's and M-Series BMW's from the late 90's, early 2000's. Likewise with the suspension and wheels. No air bags, no huge 20" wheels, no VIP, none of that. Just a nice muscular-ish look and stance like the M's and AMG's that I mentioned above.

If you have heard of or found any more info (or anyone else on here for that matter), please let me know. After six months of owning this car, I want to finally start fixing it up other than the ceramic window tint, JDM Celsior tail lights and muffler delete that I've done so far.

Many thanks in advance, and Merry Christmas!





With my brother's '18 Alfa Giulia...
Hi Buddy. Compliments of the new year to you. Yea man tuning is very much possible here in South Africa. Our tuners here are more than capable of getting it done. I suggest you email DIMSPORT ITALY and they will refer you to a tuner in your area, well that worked for me.
 
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