Tri5tate
Well-Known Member
- Thread starter
- #1
Hey.
So this post is for a friend of mine who also have a 2020 Supra 3.0. The story is pretty long, so please bare with me ?
It all started back in early 2021, when he noticed his mirrors wouldnt fold properly. Also, when he opened the door, the windows came down all the way, and would go up all the way after he closed them. He turned to the local Toyota dealer here who couldnt really find any problem. They are very incompetent here when it comes to the Supra, so that wasnt any surprise. He had some other electronical failures again and would go back and forth to Toyota for like 7 times.
Just after one of the final visits he decided to tune the car. Catless downpipe, HKS exhaust and a stage 2 with Ecutek. Car was running just fine power-wise. The only problem he still had was some bugs like the windows, mirrors and some things in the dash not working properly, so there was definitely problem with the electronics.
So when he went to Toyota the 7th time, the car was tuned but was running fine. Toyota then said they finally fixed all his problems and he is good to go. The electronical problems he had was now gone. He had to go back to the tuner because his ECU was wiped and also locked. The tuner had to take the ECU out and send it for an unlock. After a while they fixed it and his car was back to tuned again.
But after a couple of weeks he noticed that the car wasnt driving properly. Traction control was very sketchy. Giving it full gas with all systems on would still make the car slide waaaay too much, almost being scary. If he wouldnt have let of the gas, the car would've completely turned sideways. Tuner said that they never fiddled with how the TC behaves.
A little while after this he made a hard acceleration in 2nd gear and the cars power just completely died. He only thing he can do is to come to a full stop, the gas paddle doesnt work anymore, but the car is fully on and the electronics worked. He gets a message saying "Reduced driver assistance" or something along that line, but nothing about "drivetrain failure". When the car was fully stopped he tried turn it off and on again, and the problem was gone. Every time he restarts the car, the car behaves normal again.
He took it back to the tuner to have it checked if it was the tune, and they said they found some problems and that they now fixed it.
A couple of days ago we tried some launch control and the problem came back but now there's no message anymore, but it behaves the same. Give it full gas and by the time you have reached like 70 % in 2nd gear, it dies. Then it comes to a stop, and if he tries to give it gas again it just juggles forward at like max 10 mph. I cannot hear any wierd noise from the engine either. Once again, turning off and on solves the problem.
And no, we never really tried with traction fully off, which we should've had done.
Now, since his car is tuned he's worried about taking this to Toyota with this problem. Although the wierd behaviour with the windows going all the way down when opening the door has come back.
Has anybody here every experienced any problems like this? Could it possibly be tune related or just a big electronical problem within the car from factory that the Toyota dealer never really fixed? Or is it the tuning company that doesnt really know what they're doing? They are actually a big tuning company that have tuned a dozen Supras before with no problem.
Some advice about how he should carry on is appreciated!
So this post is for a friend of mine who also have a 2020 Supra 3.0. The story is pretty long, so please bare with me ?
It all started back in early 2021, when he noticed his mirrors wouldnt fold properly. Also, when he opened the door, the windows came down all the way, and would go up all the way after he closed them. He turned to the local Toyota dealer here who couldnt really find any problem. They are very incompetent here when it comes to the Supra, so that wasnt any surprise. He had some other electronical failures again and would go back and forth to Toyota for like 7 times.
Just after one of the final visits he decided to tune the car. Catless downpipe, HKS exhaust and a stage 2 with Ecutek. Car was running just fine power-wise. The only problem he still had was some bugs like the windows, mirrors and some things in the dash not working properly, so there was definitely problem with the electronics.
So when he went to Toyota the 7th time, the car was tuned but was running fine. Toyota then said they finally fixed all his problems and he is good to go. The electronical problems he had was now gone. He had to go back to the tuner because his ECU was wiped and also locked. The tuner had to take the ECU out and send it for an unlock. After a while they fixed it and his car was back to tuned again.
But after a couple of weeks he noticed that the car wasnt driving properly. Traction control was very sketchy. Giving it full gas with all systems on would still make the car slide waaaay too much, almost being scary. If he wouldnt have let of the gas, the car would've completely turned sideways. Tuner said that they never fiddled with how the TC behaves.
A little while after this he made a hard acceleration in 2nd gear and the cars power just completely died. He only thing he can do is to come to a full stop, the gas paddle doesnt work anymore, but the car is fully on and the electronics worked. He gets a message saying "Reduced driver assistance" or something along that line, but nothing about "drivetrain failure". When the car was fully stopped he tried turn it off and on again, and the problem was gone. Every time he restarts the car, the car behaves normal again.
He took it back to the tuner to have it checked if it was the tune, and they said they found some problems and that they now fixed it.
A couple of days ago we tried some launch control and the problem came back but now there's no message anymore, but it behaves the same. Give it full gas and by the time you have reached like 70 % in 2nd gear, it dies. Then it comes to a stop, and if he tries to give it gas again it just juggles forward at like max 10 mph. I cannot hear any wierd noise from the engine either. Once again, turning off and on solves the problem.
And no, we never really tried with traction fully off, which we should've had done.
Now, since his car is tuned he's worried about taking this to Toyota with this problem. Although the wierd behaviour with the windows going all the way down when opening the door has come back.
Has anybody here every experienced any problems like this? Could it possibly be tune related or just a big electronical problem within the car from factory that the Toyota dealer never really fixed? Or is it the tuning company that doesnt really know what they're doing? They are actually a big tuning company that have tuned a dozen Supras before with no problem.
Some advice about how he should carry on is appreciated!
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