First post to this interesting forum, lets see if I can get some help with an issue I’m having with my tuned Cooper S.
After having it taken in to a tuner to get the ECU remapped, I’ve ran into a problem. The engine shuts down under heavy acceleration in third and fourth gear. From what I was told, they added the highest boost-to-gear in the same range, so ive worked on the assumption that somehow the added boost triggers a error that makes the Mini ECU shut the engine off as a precaution.
I’ve connected a BMW-specific OBDII reader to check for faults, and the only thing I can find is that the DSC ECU throws a code related to “Wheel Torque”.
Anyone seen this before? Could it simply resolve itself my upping the max torque setting for the DSC ECU (and yes, I know that could be detrimental to the clutch/gearbox, but it could be a way for me to start figuring out what gives)? Or could it simply be an indication of clutch slippage?
Any input is appreciated!
And I could offer the diagnostics dump for anyone interested in seeing that!
2014 Cooper S F56
Manual gearbox
Completely stock for now, except the ECU tune
I think you need to be going back to your remapper and having them sort it. It sounds like the remap is exceeding torque limits and the ECU is shutting the engine down to protect itself.
I think you need to treat the cause (a remap thats not right for your car) rather than the symptoms (your car is shutting down under excess torque)
First post to this interesting forum, lets see if I can get some help with an issue I’m having with my tuned Cooper S.
After having it taken in to a tuner to get the ECU remapped, I’ve ran into a problem. The engine shuts down under heavy acceleration in third and fourth gear. From what I was told, they added the highest boost-to-gear in the same range, so ive worked on the assumption that somehow the added boost triggers a error that makes the Mini ECU shut the engine off as a precaution.
I’ve connected a BMW-specific OBDII reader to check for faults, and the only thing I can find is that the DSC ECU throws a code related to “Wheel Torque”.
Anyone seen this before? Could it simply resolve itself my upping the max torque setting for the DSC ECU (and yes, I know that could be detrimental to the clutch/gearbox, but it could be a way for me to start figuring out what gives)? Or could it simply be an indication of clutch slippage?
Any input is appreciated!
And I could offer the diagnostics dump for anyone interested in seeing that!
2014 Cooper S F56
Manual gearbox
Completely stock for now, except the ECU tune
I think you need to be going back to your remapper and having them sort it. It sounds like the remap is exceeding torque limits and the ECU is shutting the engine down to protect itself.
I think you need to treat the cause (a remap thats not right for your car) rather than the symptoms (your car is shutting down under excess torque)
I did get in contact with them, but they claimed it’s most likely the clutch slipping... I’m wondering if perhaps they forgot to treat any torque limiter in the DSC ECU? Could that be the culprit? Is there values for that in an manual DSC ECU? The tuner claimed it was only a possibility for automatic gearboxes!
Just trying to understand what’s going on so I can take them to school if they keep dodging ?
Yep caution defo required! I used evolve who are rightly highly regarded and have been very responsive; problem I have is car isn’t new so issue may have occurred anyway...hopefully new NGK performance plugs will sort it ?
Had a similiar thing happen to me, I have an automatic 7DCT, I have around 400 Nm on a 320 Nm rated clutches, so there was the problem at first under full throttle when the gearbox downshifted 2-3 gears - solved by not abusing it and using M/S mode.
Then there was a problem with octane number, I have to fuel in just RON 100 (98).
Do you know your tune specs? How much HP and torque you have?
These B48 engine are pretty common for my tuner, but the DCT is new. He said that the engines are having no troubles at all, since Cooper S is around 200 hp stock, tuning it up to 260-280 hp should be safe keeping it stock and not driving it like a maniac every day. I think the stock turbo should be good up to 260-280 hp.
The engine will hold up 300+hp, but don't know about pistons, injectors and cooling problems. (thats where everyone should go for a better intercooler when doing high numbers tuning)
So as you say, there might be a hidden torque limit that your tuner forgot, otherwise I have no idea since your car is manual and the clutch would just slip.
The ECU might detect knocking either due to fuel octane number.
Hi mate, Evolve quote up to 290 and torque about 460NM so great numbers and it feels rapid, faster than my Revo stage 2 Tuned Leon Cupra. I’ve got the 98RON map, awaiting the NGK ‘colder’ plugs to see if that evens out the idle ?
I’m running a bytetronik tune with 91octane (CA) and pushing right around 269.8bhp with around 406-408nm. Seems right in line with what you stated and they’ve been solid in all aspects especially responsiveness/support. Excellent at even providing sound feedback after the tune as I’ve continued my mods.
took a nice drive to a quiet lake spot for coffee after some vineyards and mountains
I'm going for the Dervtech remap at around 270-280bhp and capped at 400nm as i'm on the stock clutch - they say as i have the pro exhaust it gives an extra 8-10bhp with the valve open
I was going to wait till my warranty expires but just realised that isn't until next March - can't wait that long
I went to AReeve performance for mine. They where brilliant. Ran it with the old map and they found the issue for the problems I was experiencing. They put it back to standard and then installed a custom map. Very happy with it So much more reliable and all the power gains.
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