Range Rover's Turbo Drama: Black Smoke & Power Loss

I had nearly identical issues with my 2016 Range Rover Sport TDV6. The symptoms matched yours perfectly, black smoke, power loss, and that distinctive whistling noise. Last month at the garage, they found a damaged wiring harness leading to the boost pressure actuator. The wires were badly corroded and had several breaks, causing intermittent connections. This affected the turbo's performance and triggered the check engine light. It was quite a serious issue since it was affecting both turbos' performance and could've led to complete turbo failure if left unattended. A faulty boost pressure actuator can really mess with your fuel economy and engine performance. The fix involved replacing the entire wiring harness assembly and the actuator itself. Took about 6 hours of labor but solved all the symptoms, no more smoke, jerking, or whistling. The engine runs smooth now, both at idle and during acceleration. My advice? Get it checked soon. These symptoms typically don't improve on their own and could lead to more expensive repairs if ignored.

Yeah this sounds exactly like what I went through. That wiring harness issue can be such a pain! Glad you got it sorted. Since you went through the same ordeal, do you remember roughly how much you ended up paying for the whole repair? Also, has everything been running smoothly since, or have you noticed any other quirks popping up? I'm asking because I had a similar fix on my RR, and while it solved the main problem, I started noticing some minor issues about a month later. Just curious about your experience.

Hey again! Yeah, I can give you the exact numbers, the repair set me back 155.00 € for fixing that damaged wiring harness connected to the boost pressure actuator. And honestly, it was money well spent! Since the fix, my Range Rover's been running like a dream, no more black smoke, weird noises, or any of those annoying issues we discussed before. The turbo response is spot on now, and that jerky acceleration is completely gone. It's such a relief not seeing that check engine light anymore! I haven't noticed any new quirks or problems popping up, which is fantastic. The mechanic did a proper job with the wiring harness, and it seems like they caught it before it could cause any serious damage to the turbos. What kind of minor issues are you experiencing? Might be worth getting them checked out early before they turn into something bigger. These Range Rovers can be a bit temperamental sometimes, but once you get them sorted, they're brilliant machines.

Thanks for sharing that detailed feedback! I finally bit the bullet and took my Range Rover to a mechanic last week. You were spot on about getting it checked early. The wiring harness was indeed the culprit, along with a slightly damaged boost pressure actuator. The whole repair cost me a bit more than yours, around 180.00 € in total, but it was definitely worth every penny. The car's running beautifully now, no more black smoke or that awful whistling sound. The engine feels much more responsive, and that annoying jerking during acceleration is completely gone. Even that worrying idle shake has disappeared. The mechanic I found was actually quite knowledgeable about Range Rovers, which was a pleasant surprise after my previous bad experience. Those minor issues I mentioned earlier? Turns out they were just my paranoia after the first bad repair job. Everything's working perfectly now, and I'm kicking myself for not getting it fixed sooner. Really appreciate your help in pushing me to get it sorted!