My GS300 Turbo VS 12 second Mach 1
Thread Starter
Lead Lap
Joined: Sep 2003
Posts: 663
Likes: 3
From: Florida
Map ECU is easy to tune, I rigged up a 1K ohm resistor to my temp sensor so the temp gauge stays down and the car stays in open loop "cold start mode" It makes tuning easier, I lose my temp gauge but it works. If you go to www.mapecu.co.nz they have a forum that is just starting out but I was able to ask the mapecu designer questions there. You should probably read my posts over there he helped me set it up. Tuning is easy, just get into the 3D map, input the value of chance (1-99%) and hit the up or down page key to take away or add fuel, you need a wideband, I reccomend the Innovate XD-1.
Pole Position
Joined: Mar 2005
Posts: 213
Likes: 0
From: FL
Glad to see your car is running good now. I also have the map-ecu and am gonna try the resistor mod. I have been following your threads on a couple of sites. I raised my idle to 800 and the car is running great now. No stalls after boosting. I was gonna take out my 85lb injectors and put smaller ones in but you gave me hope. Thanks for the info. Your car stays in open-loop all the time now?? That would be great news for my tuning issues. The stock ecu is always readjusting.
Thread Starter
Lead Lap
Joined: Sep 2003
Posts: 663
Likes: 3
From: Florida
Glad to see your car is running good now. I also have the map-ecu and am gonna try the resistor mod. I have been following your threads on a couple of sites. I raised my idle to 800 and the car is running great now. No stalls after boosting. I was gonna take out my 85lb injectors and put smaller ones in but you gave me hope. Thanks for the info. Your car stays in open-loop all the time now?? That would be great news for my tuning issues. The stock ecu is always readjusting.
ClubLexus Stories
Celebrating Lexus & Toyota from Around the Globe
Top 10 Most Confusing Things Lexus Has Ever Done!
Joe Kucinski
2026 Lexus ES Review: Lexus Re-Embraces Founding Principles
Michael S. Palmer
10 Lexus Bargains That are Cheaper Than a New Toyota RAV4
Joe Kucinski
8 Weirdest Things Lexus Has Ever Built
Verdad Gallardo
10 Lexus Designs That Have Aged Like Fine Wine
Verdad Gallardo
8 Tips for Improving Your Hybrid or Plug-in Hybrid's Efficiency!
Michael S. Palmer
10 Best Lexus Models No One Remembers
Joe Kucinski
TRD Off-Road Premium: Best 2026 4Runner, Except This One Thing
Michael S. Palmer
Top 10 Lexus & Toyotas to Drive Before You Die!
Joe Kucinski
Thread Starter
Lead Lap
Joined: Sep 2003
Posts: 663
Likes: 3
From: Florida
Thread Starter
Lead Lap
Joined: Sep 2003
Posts: 663
Likes: 3
From: Florida
Probably take it to speedworld in the next few weeks after my next round of mods.
I already listed my mods, very basic.. turbo, fuel, intercooler, MAP ECU, Wideband, and custom pipes, I made my own fuel line, bought al the oil feed / return fittings and lines. It took awhile to piece it all together, lots of work, did the headgasket too.
I already listed my mods, very basic.. turbo, fuel, intercooler, MAP ECU, Wideband, and custom pipes, I made my own fuel line, bought al the oil feed / return fittings and lines. It took awhile to piece it all together, lots of work, did the headgasket too.
Driver School Candidate
Joined: May 2015
Posts: 3
Likes: 0
From: DC
Thank you for sharing this information. Are you seeing any negative side effects of being in open loop 100% of the time? Do you see any CELs or have any running issues?
I am putting together a NA-T VVTi build for a SC300 and the ECU is the last piece of the puzzle! Any more help would be greatly appreciated!
I am putting together a NA-T VVTi build for a SC300 and the ECU is the last piece of the puzzle! Any more help would be greatly appreciated!
Thread
Thread Starter
Forum
Replies
Last Post
mcnelson
2Gen GS430 / 400/ 300 Classifieds (98-05)
7
Apr 9, 2003 05:38 PM
