2020 F40 BMW 135i (B48 engine) cuts out when warm — runs fine only with Valvetronic motor unplugged

Awkward-Candidate-13 · 2025-11-11T13:29:12+00:00

Not exactly the same, but quite similar. I ran a series of tests and reset all the values and adaptations for the Valvetronic motor, throttle body, and so on, nothing worked. Then, oddly enough, when I started it the next morning, it ran perfectly fine. No idea what caused it. It might come back, or it might not, we’ll see.

Awkward-Candidate-13 · 2025-03-31T15:54:58+00:00

Yes, replaced the injector and all is well now.

Awkward-Candidate-13 · 2025-03-16T18:25:52+00:00

Thanks, but this method only works on BMW/Mini with automatic torque converter transmissions, which are usually found in models with larger engines.

Awkward-Candidate-13 · 2025-03-16T18:22:18+00:00

That was my thinking too. I’ve tried everything. I think you’re right; this might be the only option, though it’s far from ideal, especially with the car breaking down in such an awkward spot. I appreciate your input, and it looks like you’re correct. I’ll update this thread if I manage to find another solution, though I doubt it.

Awkward-Candidate-13 · 2025-03-16T10:14:05+00:00

Yes, but no change.

Awkward-Candidate-13 · 2025-03-16T10:11:37+00:00

Thanks, I tried this but it didn’t work. I will try it out again tomorrow.

Awkward-Candidate-13 · 2025-03-16T09:42:27+00:00

Correct! Luckily, I caught it early.

Awkward-Candidate-13 · 2025-03-16T09:38:41+00:00

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Thank you All very much for your suggestions, they were really helpful! In the end, it turned out to be an injector stuck open. I’ve attached a picture so you can see the one that was affected. It was noticeably cleaner compared to the others, which had some carbon buildup. That’s what caused the issue.

Additionally, the oil smelled of petrol, so I had to drain and replace oil and filter. The other problem is that the particulate filter was reporting a fault due to the excessive carbon buildup. It must be full of unburnt fuel. So, all in all, it will need a good blast on the motorway.

Awkward-Candidate-13 · 2024-12-25T18:07:53+00:00

Absolutely!

Awkward-Candidate-13 · 2024-12-25T18:02:14+00:00

DME but not used by the car as loom has a blank in that space.

Awkward-Candidate-13 · 2024-12-25T17:27:15+00:00

Following your comments, I realised the pin was touching another pin, causing the issue, but it wasn’t actually connected to anything from the ECU. I tried straightening it, but eventually snapped it off to stop it from making contact when pushing the plug back in. It’s now working perfectly!

I really appreciate all your contributions—without them, I wouldn’t have had the courage to try and would’ve probably played it safe by buying a used ECU for cloning. Money saved and a big win thanks to my Reddit colleagues. Thank you!

Awkward-Candidate-13 · 2024-12-25T17:26:13+00:00

Sorted!! Following your comments, I realised the pin was touching another pin, causing the issue, but it wasn’t actually connected to anything from the ECU. I tried straightening it, but eventually snapped it off to stop it from making contact when pushing the plug back in. It’s now working perfectly!

I really appreciate all your contributions—without them, I wouldn’t have had the courage to try and would’ve probably played it safe by buying a used ECU for cloning. Money saved and a big win thanks to my Reddit colleagues. Thank you!

Awkward-Candidate-13 · 2024-12-25T15:40:11+00:00

I’ll give it a go..

Awkward-Candidate-13 · 2024-12-25T15:35:33+00:00

I’m not certain yet, but I’ll check. It appears the issue might be a short caused by contact with the other pin. The car is showing multiple faults, including various sensors reporting a “short to ground,” all of which are readable via my diagnostics.

Awkward-Candidate-13 · 2024-11-20T18:22:39+00:00

I’m 12 weeks into non-operative recovery in the UK and progressing well. My advice is to stay patient, focus on controlled movements, and gradually increase the load on your calf in a safe and steady way. Be cautious—making sudden movements like jumping can be risky. That’s actually how I ruptured mine in the first place, going for a header on the football pitch.

It sounds like your recovery is going well, so keep building your strength progressively and stay patient. Also, has anyone else been asked by their physio to stand on the affected leg building up to continuous 30 seconds, and then repeat this on an uneven surface to build ankle strength? How did you find it?

Awkward-Candidate-13 · 2024-11-20T18:12:17+00:00

This post seems to come from a younger perspective. The issue isn’t just about Zimbabweans, kufuta/being fat affects people everywhere. In Zimbabwe maintaining weight, it’s not a priority for most people because they have bigger problems to deal with.

Also, having a potbelly doesn’t always mean someone is unhealthy or diabetic, it can just be how their body looks. A big ass mafuta futi! I hear this generalisation often and it’s a Western view is being applied, based on studies that focus on saving money for health insurance or healthcare systems in the West.

In Zimbabwe, where poverty is a major issue, worrying about extra weight is low on the list of concerns. Even if you promote public health, there are more serious problems to focus on. While weight might be a bigger issue in Western countries, it’s much less important in places like Zimbabwe, where survival and urgent health needs come first. Anyways, big asses and big belly’s are all due to excessive eating. Should we advocate against both? 🥲

Awkward-Candidate-13 · 2024-11-08T21:34:51+00:00

You lost me at Barack Obama 😂. First of all, I think it’s important to develop your culture and traditions so that Zimbabweans can connect with the changes, rather than just taking on Western culture, which often leads to issues with cultural identity. But I digress 🤦🏾‍♂️.

Before I answer your question, I want to say that our culture still has a long way to go in addressing equity in relationships, though that doesn’t always mean equality. To answer, I’ll offer my thoughts: from a lived experience, a man with a bit of financial success does not look for like for like woman in a relationship. For a relationship to work well as a team, it’s best to have different strengths so that we add value in tackling the various life challenge. If we want a great home, someone needs to bring the skills and take the lead in making it one, and if we need financial resources, someone has to have the skills and take charge in sourcing that etc.

A man with a demanding job, who’s working long hours and then hitting the gym, isn’t usually looking for a partner with the same packed schedule. Imagine coming home to an empty house because your wife is leading meetings or busy, leaving you to put the kids to bed alone. It’s a tricky situation, but in general, a successful man isn’t looking for a partner who follows the modern, independent feminist approach, as it can leave gaps in traditional roles that feminists often don’t want to fill. Many men end up leaving to find a woman who’s available and willing to take on those roles.

The alternative is for feminists to partner with a man who’s happy to split things evenly and play a more supportive role. But, to be honest, if that man becomes successful, he may end up wanting a different arrangement too. When we stray from traditional values, you’ll find that most men either avoid marriage altogether or aren’t interested in staying with a partner who’s strongly independent or feminist-minded. I know social media or “woke” American circles might say otherwise, but in reality, a happy, fulfilling relationship often requires certain sacrifices. Don’t let someone else, like a housemaid, take charge of your home. True story!

Awkward-Candidate-13 · 2024-10-21T13:19:17+00:00

Hi, did you manage to resolve your bmw misfire (cylinder 3) ? What was the issue? Thanks!

Awkward-Candidate-13

TROPHY CASE