Black Smoke & Stalling: Eclipse Cross Diesel Mystery

Hey there, I had really similar issues with my 2016 Mitsubishi ASX diesel last year when it hit 135k km. The symptoms were exactly like yours, black smoke, rough running, stalling at idle, and terrible fuel economy. Turned out it wasn't the low pressure fuel sensor in my case, it was actually faulty cable connections to the fuel injectors. My mechanic found corroded wiring harness connections that were causing poor communication between the ECU and injectors. The cables were replaced and all connections properly sealed. It was a pretty serious issue that could've led to bigger problems if left unchecked, but not something catastrophically expensive. The fix made a massive difference, car runs smooth as new now. Based on what you're describing, I'd definitely get those connections checked out. Make sure whoever looks at it is familiar with Mitsubishi diesel systems, they can be a bit tricky. Hope this helps.

Thanks for sharing your experience! That's really helpful actually, I've been wondering if it could be something similar with the wiring. Do you remember roughly how much the repair set you back? And has everything been running smoothly since, or have you had any other issues pop up?

Hey again! Yeah, happy to fill you in! After seeing my mechanic last month for that annoying fuel system issue, everything's been running sweet as. The repair was actually pretty reasonable, came to 95€ for fixing those dodgy cable connections. Turned out I was spot on about it being similar to your situation, my Low pressure fuel system sensor wasn't working because of those faulty connections, but once they sorted that out, the car's been running like a dream. No other problems have popped up since then, honestly. The black smoke's gone, no more jerking around, and my fuel consumption's back to normal. It's such a relief when you get these things sorted without breaking the bank, right? If you're still looking for a mechanic, mine really knew their stuff with Mitsubishi diesels. Sometimes these electrical gremlins can be tricky to diagnose, but a good mechanic who knows the brand will spot it pretty quick. Let me know how you get on with yours!

Thanks so much for all the info! Just wanted to update you on what happened. I took your advice and found a Mitsubishi specialist nearby. Turns out you were right on the money, it was definitely an electrical issue, but in my case, it was a combination of corroded wiring and a faulty sensor. The whole thing cost me about 150€, which wasn't too bad considering how much I was worried it might be. Got it fixed last week and what a difference! No more black smoke, the engine's running smooth, and my fuel economy is back to normal. Such a relief! The mechanic I found was great too, really took the time to explain everything and show me what was wrong. Really appreciate you sharing your experience, it definitely helped me push in the right direction instead of just throwing parts at the problem. Car's running like new now, so I guess that's another lesson learned about not ignoring these symptoms when they first show up! Thanks again for all your help!