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As the sensor hasn’t been superseded I would assume it’s down to how the ECU interprets the data from it. The TSB says the fix is a software update
GR Yaris Balance of tuning and durability limits
- Thread starter Onehp
- Start date
That’s what I was wondering when I saw your comment. Makes sense…
Yep I'm aware of that fix (actually posted the pdf's above
) . I was referring to toyota acting to produce that fix based on input from multiple owners who were experiencing that. Still, pretty strange that they started applying the software fix to cars made after may 2021, and only now, more than 2 years later have finally released this as a recall.yep, given it's a software fix, that would be my guess as well. they probably increased the analysis time window used to trigger the overheat condition, or reduced the sensor sampling rate that's effectivelly used by the AWD ECU, to avoid triggering it when momentary reading spikes occur.
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Yep I'm aware of that fix (actually posted the pdf's above
My bad sorry, should have paid more attention
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Oh I know, it’s just easier to talk in terms of peak power as most cars on standard turbos will have the same or similar power band. As you say it depends where peak torque is too. Can’t remember exactly but it’s about 400-450NM peak around 4500rpm.
The synchro issue is just a poor design, torque won’t kill them. Only solution is to slow down gear changes.
The detent spring issue again is a poor design, would happen to a standard car too.
The input shafts I agree will be more likely to fail due to increased torque but synchros and detent springs could happen to anyone
As for next steps I’ve gone with the Kotouc 7 speed sequential, just discussing ratios with them to best suit how I drive. Expensive but replacing gearboxes every 2 years is also expensive and I do like rally car noises
Huh, apparently I can't edit posts on here, didn't realise.
Just wanted to clear up that I spoke too soon, i've ordered the XShift box not the Kotouc. Went for the 12/51 gearing in the end, 7th is a little shorter than OEM 6th but the difference in fuel economy will only be about 2mpg with it running 400rpm or so higher at 110kph. Sticking the info in here until I make a proper post about it which I probably won't but maybe. Nothing like a time traveller coming back in 10 years wondering where one specific bit of info is to fix their car hahaha.
This info was kindly provided by XShift for comparison. Set to 7200rpm to calculate theoretical VMAX and rpm in 7th at cruising speeds. As you can see at 110kph (close enough to 70mph) the engine will be about 400rpm higher in 7th with the XShift but with my current aero setup I have so much drag at high speed I could use the shorter gears and just deal with the approx 15% penalty to fuel economy. when you're averaging about 18mpg anyway it doesn't really make much difference
VMAX will come down from a theoretical 286kph to 250kph but I can't remember the last time I went over 200kph anyway so that's fine. Again, with aero drag my 100-200 time is 16s which is worse than even a stock car, my gearing choice has been based purely on acceleration and in-gear punch.
OEM ratios -
7 speed 12/51 ratio -
Interestingly XShift also offer a transfer case modification to feed it via the gearbox oil pump as they say there is a risk of overheating oil in there leading to premature failure. I haven't taken this option for now but it's something that can be considered, they would need the transfer case shipped to them. I know Fensport killed theirs but they're on sticky tyres and a big turbo so I don't know how relevant this is yet to my needs.
Also decided to go full send and pick up a hybrid turbo from a company i'm working with (isn't on the market yet) and the usual Kelford 267A's and 1100cc injectors/fuel pump. If Acme need to map in the flat foot shifting they may as well map in a new turbo while they're there
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A: Might as well do the
B: YES OF COURSE ALWAYS
A: I didn't say what and you don't let me fi
B: YES
Anything else you forgot?
Technically Matteo put the idea in my head. Having a tuner who gets more excited than I do doesn't help
Michael Knight
Totally Hooked
Saw few flywheel issues with GR but not many - is this common issue with a cars with more power or just a random?
Michael Knight
Totally Hooked
I got the awd ecu update yesterday. there was no issues before so no clear if there is any major changes.
Hope the engine mount update will be also available during next spring.
I talked to my Toyota mechanic some days ago, he told me about the update ...but to put it on hold for some time, since there is an uncertainty about "power loss" or not after the update. He and his team thought the only way to get it to run cooler was to turn down the performance
Isn't it just an update to the AWD CU?I talked to my Toyota mechanic some days ago, he told me about the update ...but to put it on hold for some time, since there is an uncertainty about "power loss" or not after the update. He and his team thought the only way to get it to run cooler was to turn down the performance
Afaik we're talking about a physically separate unit from the ECU here.
From my understanding updating the AWD CU wouldn't have any impact at all on the ECU.
- Thread starter
- #193
AWD CU could send some form of power limit signal to the Engine CU when temps rise too high, perhaps more discrete then the sudden engine limp mode - if so the update sounds still like a better idea. But the info we got is that the temp sensor calibration was off, and that should not impact power at all. Only Toyota engineers can know for sure....
doabackflip
Devoted member
This sounds very cool! What is the standard approach for fuel pump you mention? Is there anything that goes inside the tank replacing the oem pump? I’ve only seen people going for the surge tank approach like the lamspeed kit, which seems excessive unless you’re going e85. And I can’t really see how e85 works for anything other than drag racing in the UK.Just wanted to clear up that I spoke too soon, i've ordered the XShift box not the Kotouc.
Also decided to go full send and pick up a hybrid turbo from a company i'm working with (isn't on the market yet) and the usual Kelford 267A's and 1100cc injectors/fuel pump. If Acme need to map in the flat foot shifting they may as well map in a new turbo while they're there
How do you work with Acme? They are based in Italy, aren’t they? If so, do they map your car remotely? Interested as I’m also not based in Italy or Uk for that matter…
Thanks for keep sharing stuff.
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That’s correct yeah, my car is remote tuned. Matteo connects via TeamViewer on my laptop
There’s probably another 5% could be squeezed out of the car on a dyno tune but I’m not that bothered about that. When the new turbo is on I’m flying Matteo over here and hiring a dyno for a day to get mapped properly at some point but the remote stuff has been fine for now
Sam
Totally Hooked
- Dec 6, 2021
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Correct, I would get a CLONK coming from the front near side when coming off a speedbump or entering a deeper pothole. There was no vibration.
Toyota initially thought the front nearside damper was the problem so replaced that before then finding the mount loose.
RallyRob
Fascinated Member
- Dec 6, 2021
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Interesting one this, but I've been told by my local reputable dealer, that the workshop manual says that it's an engine out job for the mount replacement according the the TSB. Now, i've never heard of removing an entire engine to replace that LHS mount on any front engined car and makes literally no sense to me, as nornally you'd just support the engine below the gearbox. Anyone any comments?!
