2019 Hyundai Tucson Diesel Issues: Unstable Engine, Jerking on Acceleration, Power Loss, and Black Exhaust Smoke

Hey, sounds like I've been through a similar situation with my 2016 Hyundai Santa Fe. Had similar symptoms where she seemed to struggle a bit during acceleration. My check engine light was also on, and yep, there was some black smoke as well. It turned out that an intake system leak was to blame. It was definitely a serious issue for the car's performance. Here's what happened, air and fuel mix together in the engine, right? If there's a leak in the intake system, it messes up that balance. Too much air causes combustion to go wild, hence the black smoke and drop in power you noticed. The mechanics diagnosed the problem with a smoke test to find leaks. They replaced all the faulty intake hoses and did some serious cleaning to get rid of the deposits left from the leaking. Overall, the car was in the garage for a solid day specifying the exact issue and fixing it. So, it sounds to me like your Tucson might have the same problem. Hope this sheds some light on the issue. Good luck with it!

Hey there! I so appreciate you taking the time to type out your experience— sounds preposterously similar, I must say. Leaky intake system could indeed be the culprit, given all the signs. I remember leaving my car in the garage for a couple days last time over an engine issue, feels like deja vu! Look, I hope I'm not pestering you much, but by any chance do you remember the cost for the whole fix up of intake leaks and cleaning? Also, after all the work, did any other hitches crept up? Always handy to be one step ahead. Thanks a bunch again!

Hey again! Not a problem at all, happy to help out a fellow Hyundai enthusiast! So, about the repair costs, I had to fork out a neat sum of 425.00€ for the whole intake system leak fix. That included parts replacement and a thorough cleaning. It might seem a bit pricey, but believe me, it was all worth it. Shortly after the fix, I noticed my car running smoother than ever before. Believe it or not, it practically felt like driving a new vehicle! Now, about if there were any other gremlins that popped up afterward...well, to be honest, there was some concern about the unsettled engine and how it was possibly deviating the intake quantity. But after seeing the mechanic, that issue was sorted too. I guess it all was connected in some way. Hope that answers your questions, and remember don't stress over it! Once your Tucson gets the care it needs, she'll be running like a dream!

Brilliant stuff! You've been a real help. 425.00€ does seem a bit steep, but if it gets her purring like a kitten again, it's going to be money well-spent. Your experience surely validates my suspicions about the leaking intake system's connection with the unsettled engine. Your advice has given me a lot more confidence for this upcoming garage visit. I'll keep the fingers crossed for a smooth and hassle-free fix. Once she's sorted, I'll be back on the road enjoying her performance. Will make sure to keep this thread updated about how it all turns out. Cheers!