Notices
LS - 3rd Gen (2001-2006) Discussion topics related to the flagship Lexus LS430

LS430 ECU Tuning

Thread Tools
 
Search this Thread
 
Old Sep 28, 2021 | 10:07 PM
  #31  
PNWLS430's Avatar
PNWLS430
Driver School Candidate
 
Joined: Dec 2020
Posts: 19
Likes: 10
From: Wa
Default

I guess i might have received two bad ECUs in a row.


Last edited by PNWLS430; Sep 29, 2021 at 05:42 PM.
Reply
Old Sep 29, 2021 | 08:41 PM
  #32  
4U2QUIK's Avatar
4U2QUIK
Driver School Candidate
 
Joined: Jul 2010
Posts: 23
Likes: 0
From: Ca
Default

that's happened a couple times where people got a couple bad ones in a row. I apologize for the inconvienance I'm right now working on a device to test them ahead of time so this will stop happening. It's very frustrating and time consuming for me every time it happens.
There's no way to test them at this time without having every model of car present which is is not a possibility because of space.
But, Like I was saying, I will have this figured out soon as this last round has really frustrated me.

Only other alternatives are to stop offering supplied ecu's or recap every ecu which drives up the price by about 300$ per ecu.
Reply
Old Sep 30, 2021 | 12:25 PM
  #33  
Striker223's Avatar
Striker223
Lexus Champion
5 Year Member
Liked
Loved
Community Favorite
 
Joined: Oct 2019
Posts: 18,190
Likes: 1,763
From: Ohio
Default

Originally Posted by 4U2QUIK
that's happened a couple times where people got a couple bad ones in a row. I apologize for the inconvienance I'm right now working on a device to test them ahead of time so this will stop happening. It's very frustrating and time consuming for me every time it happens.
There's no way to test them at this time without having every model of car present which is is not a possibility because of space.
But, Like I was saying, I will have this figured out soon as this last round has really frustrated me.

Only other alternatives are to stop offering supplied ecu's or recap every ecu which drives up the price by about 300$ per ecu.
Can we request a recap service when we order? The ones I have gotten from you guys have been all good so far but it would be nice to know they have been fully gone through....
Reply
Old Oct 2, 2021 | 02:15 AM
  #34  
notmill's Avatar
notmill
Pit Crew
 
Joined: Feb 2019
Posts: 141
Likes: 68
From: CA
Default

Originally Posted by 4U2QUIK
that's happened a couple times where people got a couple bad ones in a row. I apologize for the inconvienance I'm right now working on a device to test them ahead of time so this will stop happening. It's very frustrating and time consuming for me every time it happens.
There's no way to test them at this time without having every model of car present which is is not a possibility because of space.
But, Like I was saying, I will have this figured out soon as this last round has really frustrated me.

Only other alternatives are to stop offering supplied ecu's or recap every ecu which drives up the price by about 300$ per ecu.
I've had an issue of the car lurching forward at 10 to 15 miles an hour in first or second under very very light throttle with the quantum/all4swap ECU. Is it also due to to this issue? I remember reading somewhere that SIA just reflowed the boards with hot air as the shifting issues were due to cold joints. Is this a different problem from that?

Having the ECU in the engine bay probably isn't the best place huh....
Reply
Old Oct 4, 2021 | 11:14 AM
  #35  
jharris400's Avatar
jharris400
Intermediate
5 Year Member
Liked
Loved
Community Favorite
 
Joined: Sep 2018
Posts: 277
Likes: 73
From: GA
Default

Originally Posted by notmill
I've had an issue of the car lurching forward at 10 to 15 miles an hour in first or second under very very light throttle with the quantum/all4swap ECU. Is it also due to to this issue? I remember reading somewhere that SIA just reflowed the boards with hot air as the shifting issues were due to cold joints. Is this a different problem from that?

Having the ECU in the engine bay probably isn't the best place huh....
Full size GM instrument clusters do the same thing, they have large surface mount resistors that break solder joints just like the LS ECU's. I think it's the heat from the resistor that causes the problem and not the ambient heat.
Reply
Old Oct 6, 2021 | 04:29 PM
  #36  
Fojo's Avatar
Fojo
Pit Crew
 
Joined: Mar 2011
Posts: 175
Likes: 22
From: fl
Default

I sent mine to quantum auto, hes been pretty communicative so far. I asked enough questions for us to both decide it was better to send in my original ecu so there isn't any compatibility issues. My LS is a 04 UL with 6 spd, the extra goodies the UL has would have been out of whack with one of theirs. On another note, I had my ecu repaired by SIA electronics for the shift problem and I didn't wanna lose that repair. I'll report back when I get it
Reply
Old Dec 20, 2021 | 11:13 PM
  #37  
Fo30Robert's Avatar
Fo30Robert
Driver School Candidate
 
Joined: Dec 2021
Posts: 2
Likes: 0
From: California
Default

[QUOTE=02Legend;10936112]I ordered an ECU from Quantum-Auto a couple of weeks ago and it is supposed to arrive tomorrow. Not sure exactly when I will put it in just yet.[/QUOT]

Ay bro what does it mean for the ect power on, snow, like the tune will be activated w ect power on if I choose that ?
Reply
Old Dec 21, 2021 | 09:44 AM
  #38  
02Legend's Avatar
02Legend
Intermediate
15 Year Member
Liked
Loved
Community Favorite
iTrader: (3)
 
Joined: May 2008
Posts: 447
Likes: 45
From: MD
Default

[QUOTE=Fo30Robert;11186586]
Originally Posted by 02Legend
I ordered an ECU from Quantum-Auto a couple of weeks ago and it is supposed to arrive tomorrow. Not sure exactly when I will put it in just yet.[/QUOT]

Ay bro what does it mean for the ect power on, snow, like the tune will be activated w ect power on if I choose that ?
Basically, yes. You can have it setup to where as if you push PWR that it will utilize the parameters you had changed. I still have yet to install mine though, life and work keep getting in the way.
Reply
Old Dec 21, 2021 | 11:49 PM
  #39  
Fo30Robert's Avatar
Fo30Robert
Driver School Candidate
 
Joined: Dec 2021
Posts: 2
Likes: 0
From: California
Default

Originally Posted by marsmango
I received my new ECU yesterday and installed it this morning. Note that key reprogramming is required, and you need the master key (not valet) to do this. Below are some instructions I found from another thread (source)



Instead of the SST, you can simply use a paperclip or wire to connect the two pins. Overall, it's fairly straightforward and you should see all the lights flashing. Another note about installation, be careful removing the 4 screws holding the original ECU, it's very easy to strip the heads on these.

I'm fairly impressed driving with the new ECU. I mostly drive in ECT PWR, and that's when you can notice the most difference. The throttle response is almost instantaneous, it reminds me of Sport mode in newer Lexus vehicles. Gears are definitely held for longer. I opted to have my rev limit increased to 7500, but did not test this out yet. Something odd I noticed was when driving in manual mode, it does not downshift into second gear (nothing happens). I'm not sure if that is normal. After I installed the new ECU, the CEL turned on and I had a DTC for P1765. I had no DTCs prior to installing the new ECU, but maybe this is a coincidence. Everything seems to shift fine except for second gear. I will likely try my original ECU and see if I have the same DTC.

Turnaround time and communication for quantum-auto was fairly good as well. I ordered a new ECU instead of sending mine in, and it took 9 days from order placed to delivered. If I can get that DTC resolved, I can probably take this to the dyno and test it.
Is it safe to alter the rev limit to 7500??
Reply
Old Dec 22, 2021 | 02:06 AM
  #40  
kaizmauka's Avatar
kaizmauka
Driver
 
Joined: Feb 2017
Posts: 118
Likes: 9
From: BC
Default

Originally Posted by Fo30Robert
Is it safe to alter the rev limit to 7500??
Incertsinly wouldn't be messing with the stock rev limiter unless the engine is adequately built to withstand higher rpms...and how many guys with built LS430s do you know?! 3uzfe swaps seem to be popular in some commonwealth countries and Eastern Europe, those guys are pushing the 3uzs pretty hard on the track...our engines were utilized by Toyota race cars afterall! Sounds like something i'd get in trouble with though...this car seems to like the number "7"...i'll let 7 be my ceiling.
Reply
Old Dec 22, 2021 | 10:09 AM
  #41  
Striker223's Avatar
Striker223
Lexus Champion
5 Year Member
Liked
Loved
Community Favorite
 
Joined: Oct 2019
Posts: 18,190
Likes: 1,763
From: Ohio
Default

Originally Posted by Fo30Robert
Is it safe to alter the rev limit to 7500??
No and it's a waste, stop at 7k and even then you are going to beat the hell out of the stock valve springs.

If you had a 1UR sure, go 7.5
Reply
Old Mar 28, 2022 | 01:22 PM
  #42  
mikes430ls's Avatar
mikes430ls
9th Gear
 
Joined: Mar 2022
Posts: 9
Likes: 1
From: CA
Default

Originally Posted by Striker223
I have it as well, going to the track next week t see if it improved the times. I've already observed a full second improvement 0-60 for my car that puts it below factory new spec. Compensates for 215k miles of wear and then some nicely
did you just get a remap tune or do you have any other bolt on??
I just sent my ecu for a remap tune but I also bought ppe headers and a intake and I already have a straight pipe true dual exhaust also going to be getting rid of my other 2 cats
Reply
Old Mar 28, 2022 | 01:51 PM
  #43  
Striker223's Avatar
Striker223
Lexus Champion
5 Year Member
Liked
Loved
Community Favorite
 
Joined: Oct 2019
Posts: 18,190
Likes: 1,763
From: Ohio
Default

Originally Posted by mikes430ls
did you just get a remap tune or do you have any other bolt on??
I just sent my ecu for a remap tune but I also bought ppe headers and a intake and I already have a straight pipe true dual exhaust also going to be getting rid of my other 2 cats
Totally stock but fresh everything maint wise
Reply
Old Mar 28, 2022 | 01:58 PM
  #44  
mikes430ls's Avatar
mikes430ls
9th Gear
 
Joined: Mar 2022
Posts: 9
Likes: 1
From: CA
Default

Originally Posted by Striker223
Totally stock but fresh everything maint wise
is your re map tune from quantum auto? I got a used oem ecu from another ls430 but wow a full second 0-60 with everything stock that’s crazy
Reply
Old Mar 28, 2022 | 02:26 PM
  #45  
Striker223's Avatar
Striker223
Lexus Champion
5 Year Member
Liked
Loved
Community Favorite
 
Joined: Oct 2019
Posts: 18,190
Likes: 1,763
From: Ohio
Default

Originally Posted by mikes430ls
is your re map tune from quantum auto? I got a used oem ecu from another ls430 but wow a full second 0-60 with everything stock that’s crazy
Yes, went from 6.7 to high 5s and 14.6 1/4 vs 15.1
Reply



All times are GMT -7. The time now is 10:09 AM.