A91 & Recent 2021 Impossible to Tune / ECU manufactured after 2020/6 is locked?

Snorlax27

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I've actually been following Spiguyver on youtube. He has a JB4 piggyback tune on his supra. I will be looking into that option over the next few months. The only issue is that I don't think you can clear CELs with JB4 tunes. I REALLY want to get a catless downpipe on this car, but it doesn't seem feasible at the moment.
If I recall correctly, I think you can clear CEL codes manually but I don’t think it will auto clear/ block the CEL from coming on due to a catless downpipe.

@Spiguyver is around on the forums. Actually, here was a thread he had regarding the Burger tuning products:

https://www.supramkv.com/threads/jb4-added-to-2021-a91-edition.6964/

If a CEL is your main concern, I would look into a catted downpipe such as the one active autowerke makes. Unless you’re going full race car/ maximum gains, a free flowing downpipe might just be right for you. I threw one of those bad boys on and love the sound. Noticeably louder but not obnoxious :yes:.

A lot of the BMW guys use JB4 and it’s a proven product. It may just hold you over until these newer ECUs get unlocked.
 

BA9092

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I was looking into going with an HFC unit from either AA, AMS or Powerneedy then adding the JB4 next summer.

However, from lurking in various forums and online searches, there have been at least a couple of people who reported the CEL after a few hundred miles even with each of these "no-CEL guarantee" catted units.

I'm hesitant to pull the trigger unless I go with a full Ecutek tune as the JB4 only temporarily clears the codes on an HFC, from what I've read. :dunno:
 

ijrebuck

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Other than an annoying light, are there any other issues with the jb4 and a catless downpipe? I can deal with clearing the light every few days if it's just that
 

Spiguyver

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I've actually been following Spiguyver on youtube. He has a JB4 piggyback tune on his supra. I will be looking into that option over the next few months. The only issue is that I don't think you can clear CELs with JB4 tunes. I REALLY want to get a catless downpipe on this car, but it doesn't seem feasible at the moment.
You can clear them using the JB4 mobile app while in diagnostic mode. But you will still get the CELs.
 

ayau

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nothing is ’uncrackable’. if someone wants to get into the ecu, they’ll find a way.

give this ecu to samy kamkar (famous security researcher), and i bet he’ll find a way in.
 
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Marshall@ViscontiTuning

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I've actually been following Spiguyver on youtube. He has a JB4 piggyback tune on his supra. I will be looking into that option over the next few months. The only issue is that I don't think you can clear CELs with JB4 tunes. I REALLY want to get a catless downpipe on this car, but it doesn't seem feasible at the moment.
Correct. A piggyback wont eliminate a CEL.
 

dethred

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JB4 has a mode in the WMI section of the app that will auto-delete CEL's basically appearing to you that it never shows up. This option is locked out in US (I'm assuming for legal reasons), but if you use a VPN on your phone, change to another country, go into JB4 dev options and detect country, it'll unlock the CEL delete option.
 

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I’m doing it Dec 30th, I’ll let you know.
Update: the tuner in Florida wasn’t able to tune my car. He shipped my DME out to California. Carbahn told me they can tune it and know how to get around the 06/20 locked DME’s. I should know more by Tuesday.
 

VA90

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Update: the tuner in Florida wasn’t able to tune my car. He shipped my DME out to California. Carbahn told me they can tune it and know how to get around the 06/20 locked DME’s. I should know more by Tuesday.
Cool. i guess what I don’t understand is whether Carbahn has a JB4-type piggyback solution or if they can actually unlock the ECU. I’m not an expert but it seems like there’s a big difference between the two.
 

Jon H

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The information of someone with this capability would spread like wildfire. Hoping its true though.
 

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Cool. i guess what I don’t understand is whether Carbahn has a JB4-type piggyback solution or if they can actually unlock the ECU. I’m not an expert but it seems like there’s a big difference between the two.
I agree, big difference.
The carbahn tune has to unlock the DME to work. That’s why it hasn’t been available until now. They’re claiming they can. I should know more tomorrow.
 

MambasupraTX

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I agree, big difference.
The carbahn tune has to unlock the DME to work. That’s why it hasn’t been available until now. They’re claiming they can. I should know more tomorrow.

Keep me posted, I have a ECU date of 6/26/2020 and per Titan, Visconti and others ECU is locked and cannot be tuned until further notice. I am unsure if this Carbahn company is just full of it . Titan motorsports claims ECU DATES of 6/21/2020 , but anything after they cannot unlock. Visconti states 6/1/2020 and after nothing can be unlocked, both are reputable companies. Kies motorsports states anything after 6/21/2020 nothing can be unlocked as well. Keep us updated ! what is your ECU DATE to be on the dot? 6/?/2020
 

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Keep me posted, I have a ECU date of 6/26/2020 and per Titan, Visconti and others ECU is locked and cannot be tuned until further notice. I am unsure if this Carbahn company is just full of it . Titan motorsports claims ECU DATES of 6/21/2020 , but anything after they cannot unlock. Visconti states 6/1/2020 and after nothing can be unlocked, both are reputable companies. Kies motorsports states anything after 6/21/2020 nothing can be unlocked as well. Keep us updated ! what is your ECU DATE to be on the dot? 6/?/2020
Well, sorry for the bad news, but Carbahn was unable to unlock my DME. They were apologetic and said they think they’ll have it figured out in a week.
 

ijrebuck

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Keep me posted, I have a ECU date of 6/26/2020 and per Titan, Visconti and others ECU is locked and cannot be tuned until further notice. I am unsure if this Carbahn company is just full of it . Titan motorsports claims ECU DATES of 6/21/2020 , but anything after they cannot unlock. Visconti states 6/1/2020 and after nothing can be unlocked, both are reputable companies. Kies motorsports states anything after 6/21/2020 nothing can be unlocked as well. Keep us updated ! what is your ECU DATE to be on the dot? 6/?/2020
Titan Motorsports couldn't unlock mine and my date is 06/05
 

JWC67896

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Carbahn said no problem . But would only.load their tune on it
 
 
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