Interested in ECU tune for the ISF ?
#48
Tech Info Resource
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I don't think there's any issue with sending the ECM as long as the changes can be verified. The guy who came on here years ago required shipping the ECM, but the only problem was no one could clearly validate anything changed except they drove their cars very hard during the relearning phase.
IMHO, if you have to ship it to someone who doesn't want to release the security codes, but can make verifiable changes, it's the best choice we have today.
IMHO, if you have to ship it to someone who doesn't want to release the security codes, but can make verifiable changes, it's the best choice we have today.
#50
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The primary O2 sensor for each cylinder bank is a wideband planar sensor. The secondary is NB.
It may be possible to have some serious problems if you purchase a junkyard ECM, have it flashed, and then install it. I would not want to be the guinea pig for doing it this way. The key security system is certificate based, and there is a sequence of exchanges that happen between the certification ECU and the ECM before the engine will start. Because of this, it might be necessary to have the "new" ECM installed in the car and registered with the certification ECU for the smart key to work.
I am not 100% certain, but again, I wouldn't want to find out the hard way unless I was prepared to have a Techstream security specialist on hand to make sure nothing goes wrong.
So - update - swapping ECMs (not removing and reinstalling the same unit) means you'll need to initialize the TCM, throttlebody, and write the correct VIN to the ECM. Toyota tech data is very clear this must be done with Techstream. Also, there is a procedure for initializing the ID Code ECU which is the thing generating the immobilization code to prevent theft. This procedure requires you to turn the car on without starting the engine with CG and TC pins in the DLC shorted for 30 minutes. If you don't do this, the engine won't start.
It may be possible to have some serious problems if you purchase a junkyard ECM, have it flashed, and then install it. I would not want to be the guinea pig for doing it this way. The key security system is certificate based, and there is a sequence of exchanges that happen between the certification ECU and the ECM before the engine will start. Because of this, it might be necessary to have the "new" ECM installed in the car and registered with the certification ECU for the smart key to work.
I am not 100% certain, but again, I wouldn't want to find out the hard way unless I was prepared to have a Techstream security specialist on hand to make sure nothing goes wrong.
So - update - swapping ECMs (not removing and reinstalling the same unit) means you'll need to initialize the TCM, throttlebody, and write the correct VIN to the ECM. Toyota tech data is very clear this must be done with Techstream. Also, there is a procedure for initializing the ID Code ECU which is the thing generating the immobilization code to prevent theft. This procedure requires you to turn the car on without starting the engine with CG and TC pins in the DLC shorted for 30 minutes. If you don't do this, the engine won't start.
Yuuuuuup!
Also, I'd need to know exactly what maps and parameters are being changed before sending an ECU out.
#51
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True, but for various reasons (cat preservation, idiots using low octane) most cars are tuned stupid rich with safe timing. There might be enough wiggle room for a safe canned tune that adds enough to be detected by the butt dyno.
#52
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All this means is the factory fudges on the rich side in case anything goes wrong at WOT so they're not buying you a new engine for a minor fault or failure. Tuning closer to the edge means you're taking a calculated risk that it may be easier to detonate the engine under WOT conditions if something does go wrong (bad fuel, clogged filter or injector, fuel pump failure, etc.).
#53
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Very much agreed. Also keep in mind, fuel will be automatically adjusted based on O2 sensor results to the tune of +/-20% to suit the particulars of the engine. What we're really changing is the target values for the wideband O2 sensors and possibly the base numbers in the fuel maps, but at the end of the day, the ECM is going to tweak based on results, and it will arbitrarily apply the correction factor it calculates in closed loop to the WOT maps because they run in open loop.
All this means is the factory fudges on the rich side in case anything goes wrong at WOT so they're not buying you a new engine for a minor fault or failure. Tuning closer to the edge means you're taking a calculated risk that it may be easier to detonate the engine under WOT conditions if something does go wrong (bad fuel, clogged filter or injector, fuel pump failure, etc.).
All this means is the factory fudges on the rich side in case anything goes wrong at WOT so they're not buying you a new engine for a minor fault or failure. Tuning closer to the edge means you're taking a calculated risk that it may be easier to detonate the engine under WOT conditions if something does go wrong (bad fuel, clogged filter or injector, fuel pump failure, etc.).
#54
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taku san does not use a conditioner for his aftermarket headers. part of the sard tuner is to adjust where needed so there are no check engine lights and it runs smoothly.so if u have ppe headers or sikky,tuned it with the sard tuner, the conditioner would be removed . taku also raised the rpm limit to 7115.
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#55
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If you guys are flying out Taku from Japan to tune your car, what happens when you add a mod and need to retune it? I hope you can find local guys that knows our engines really well. Having a tuned car does not mean its the end of all tuning.. sometimes cars might run a little weird after a few thousand miles of driving and needs a slight adjustment.
All my friend's cars are tuned and even the best tuners in Socal sometimes couldn't get the tune right after one session. I also hope this comes with a user friendly program to reset the tune back to stock if need be.
I have a Cobb Accesspro on my other car and I can set my tunes on the go so with this, I'm hoping its the same experience.
All my friend's cars are tuned and even the best tuners in Socal sometimes couldn't get the tune right after one session. I also hope this comes with a user friendly program to reset the tune back to stock if need be.
I have a Cobb Accesspro on my other car and I can set my tunes on the go so with this, I'm hoping its the same experience.
#57
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Very much agreed. Also keep in mind, fuel will be automatically adjusted based on O2 sensor results to the tune of +/-20% to suit the particulars of the engine. What we're really changing is the target values for the wideband O2 sensors and possibly the base numbers in the fuel maps, but at the end of the day, the ECM is going to tweak based on results, and it will arbitrarily apply the correction factor it calculates in closed loop to the WOT maps because they run in open loop.
All this means is the factory fudges on the rich side in case anything goes wrong at WOT so they're not buying you a new engine for a minor fault or failure. Tuning closer to the edge means you're taking a calculated risk that it may be easier to detonate the engine under WOT conditions if something does go wrong (bad fuel, clogged filter or injector, fuel pump failure, etc.).
All this means is the factory fudges on the rich side in case anything goes wrong at WOT so they're not buying you a new engine for a minor fault or failure. Tuning closer to the edge means you're taking a calculated risk that it may be easier to detonate the engine under WOT conditions if something does go wrong (bad fuel, clogged filter or injector, fuel pump failure, etc.).
I ran close to 12:1 @24psi and high timing on 93 octane for years. For that engine it was tuned to the edge and the ECU did a fantastic job adjusting for different gas stations and ambient temps.
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In all I still don't expect much from this tune.
#58
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If you guys are flying out Taku from Japan to tune your car, what happens when you add a mod and need to retune it? I hope you can find local guys that knows our engines really well. Having a tuned car does not mean its the end of all tuning.. sometimes cars might run a little weird after a few thousand miles of driving and needs a slight adjustment.
All my friend's cars are tuned and even the best tuners in Socal sometimes couldn't get the tune right after one session. I also hope this comes with a user friendly program to reset the tune back to stock if need be.
I have a Cobb Accesspro on my other car and I can set my tunes on the go so with this, I'm hoping its the same experience.
All my friend's cars are tuned and even the best tuners in Socal sometimes couldn't get the tune right after one session. I also hope this comes with a user friendly program to reset the tune back to stock if need be.
I have a Cobb Accesspro on my other car and I can set my tunes on the go so with this, I'm hoping its the same experience.
#59
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taku san does not use a conditioner for his aftermarket headers. part of the sard tuner is to adjust where needed so there are no check engine lights and it runs smoothly.so if u have ppe headers or sikky,tuned it with the sard tuner, the conditioner would be removed . taku also raised the rpm limit to 7115. ![Smilie](https://www.clublexus.com/forums/images/smilies/smile.gif)
![Smilie](https://www.clublexus.com/forums/images/smilies/smile.gif)
Can he give us a 1:1 throttle response in sport mode? Preferably without having to disable cruise control.
Does he need to do anything to the TCU? I remember some members with all bolt-ons were getting rough shifts in auto mode. Maybe he can eliminate this problem, especially now it will be making more power and have a higher redline.
And... why don't we offer to fly him over here! If we have enough guys in on it. The Genesis Coupe guys have done this a few times here in Toronto and it worked out very well. I'm sure we could pick a more central location to meet in the US and have a weekend tuning event.