Ecu remap causing faults. Thoughts?

Gaygle said:
FWIW, we've just had notification at work about our BMW x30d's and to stop driving them immediately (or limit how much you rag them - we got told to keep it under 100mph, no sport auto transmission and no high engine loads) as there is now a recall for the crankshaft bearing. Maybe the bearings have gone? They could have easily been on deaths door and then the extra strain of the map, and how the guy was driving it, finished them off?
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sputter bearings in the n57 iirc. They’re strong.
 
sigma said:
Are you referring to the seller here?

Was the car sold as having 40k miles? Do you still have a copy of the advert? Bit late now, but I'm guessing you didn't do an HPI check?

Look at the MOT history online, you should see the difference in recorded mileage.

Sounds like you'll probably end up going down small claims if you want a refund from the seller however the remap does add another dimension which may not make it clear, especially in the eyes of a judge who won't be a car person. What you need is some sort of expert diagnosis, which is the route you seem to be going down by asking BMW, this is the correct path to choose - be sure to get a detailed report from them, outlining the suspected cause if possible. when the BMW quote is really high I'd check it with a local BMW specialist as getting it fixed and moving on might be the least hassle, given the remap situation, that does seem like a potential get out clause from the seller. If you can prove they lied about the mileage I still think you're good to ask for a refund (especially if it's after fixing the current issue yourself).
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Fixed that for you. :p
 
Frozennova said:
The B58 in the Supra is no different to the B58 found in any 2018 onwards BMW Model
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That's because they did it early on in development and it took them something like 7 years to make the Supra.

There is documentary thing on youtube somewhere which explains it.
 
Nasher said:
That's because they did it early on in development and it took them something like 7 years to make the Supra.

There is documentary thing on youtube somewhere which explains it.
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Nothing to do with it, it was a technical update from BMW to introduce a new generation high pressure fuel system and Gasoline Particulate filter to meet emissions requirements
 
Frozennova said:
Nothing to do with it, it was a technical update from BMW to introduce a new generation high pressure fuel system and Gasoline Particulate filter to meet emissions requirements
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So the reason the supra consistently tests higher on power and torque is the gpf that BMW install?
 
Dis86 said:
So the reason the supra consistently tests higher on power and torque is the gpf that BMW install?
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Both the Supra and the Z4 are fitted with a GPF in Europe. I've not come across a conclusive A/B test for a Supra vs Z4 on the same dyno on the same day
 
Frozennova said:
Both the Supra and the Z4 are fitted with a GPF in Europe. I've not come across a conclusive A/B test for a Supra vs Z4 on the same dyno on the same day
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I think the supra is meant to be around 330bhp but that's at the crank. A lot of dynos are coming up with that value at the wheels!
Saying the supra was more powerful was wrong as I believe the BMW is meant to be at 380 but the supra is coming out consistently quicker in a straight line.
 
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Dis86 said:
I think the supra is meant to be around 330bhp but that's at the crank. A lot of dynos are coming up with that value at the wheels!
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American whp dyno numbers always feel inflated to me.

Completely different kettle of fish, but my MX5 that would dyno 280bhp flywheel here would trap identical speeds at the end of the 1/4 mile compared to an american 280whp car.

Edit: US Z4s appear to dyno around 380whp against a claimed 385hp crank
 
Frozennova said:
American whp dyno numbers always feel inflated to me.

Completely different kettle of fish, but my MX5 that would dyno 280bhp flywheel here would trap identical speeds at the end of the 1/4 mile compared to an american 280whp car.

Edit: US Z4s appear to dyno around 380whp against a claimed 385hp crank
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Yup. There's definitely something awry somewhere. Would be good to see some UK figures.
 
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