Seeking Advice on Issues with 2010 Nissan Titan Diesel Engine: Possible Swirl Flap Problem

Hey there! I've got some experience with this as an aur car advisor and fellow Nissan enthusiast. I ran into a somewhat similar situation with my 2008 Nissan Navara – Diesel engine too, just like your Titan. My Navara's behavior was a bit whacky like yours, showing similar symptoms until I figured out that there was an issue with the intake manifold - it was leaking due to charring. Set me back a cool €1180 to fix, but it was worth it because the issue was sorted out completely. Thought I'd DIY it at first (especially since I do have some DIY experience tinkering with cars), but I quickly realized I was in over my head. I ended up taking it to a trustworthy workshop and they didn't disappoint. Let me ask though, has your Titan been serviced recently? Also, could you share more details about your truck? Mileage, any recent changes or modifications, have you run a diagnostic check? That info might help me to share more pertinent advice.

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Hey, thanks for getting back so soon! Definitely helpful hearing about your Navara – sorry about that €1180 dent, but glad the problem was fixed. As for my Titan, I just ran a check and there are no new modifications or changes I've made. Mileage's at 85038 KM, last service was a regular one six months back. I haven't run a thorough diagnostic test yet – reckon I should just go for it or try checking some common Titan problems first? I'd appreciate any pointers in the right direction on this! Cheers again for your help.

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Hey, no worries! We all gotta help each other out, right? That’s what this forum is for, after all. Now, about that Titan of yours - 85K KM sounds about right for swirl flap errors to start popping up, in my experience. Before you head off to potentially expensive diagnostic tests though, there's a couple of things I'd suggest you check out. First, if you're up for it, you could inspect your exhaust gas recirculation (EGR) valve. It's a pretty common issue, especially with diesels. If it's clogged up, the symptoms you described could indeed be happening. Cleaning or replacing it might solve part of the problem. Also, with the symptoms you mentioned, like power loss and black smoke, you should also check your mass airflow sensor (or have it checked if you're not comfortable with it). A faulty sensor might disrupt the air/fuel mix entering your engine, leading to those issues. Heading right for a complete diagnostic does sound like a good next step though. Depending on what it reveals, you can decide if you're willing to do the job on your own, or if you'd rather leave it to the professionals. Good luck! And do keep us updated on the progress!

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Wow, you really know your stuff! I appreciate all of the advice so much, along with the dedication. This is my weekend project now - checking out that EGR valve and the mass airflow sensor before deciding about that full-on diagnostic test. I’ll follow your footsteps and leave to the professionals if things don’t go as planned. A big thanks again! I'll definitely keep everyone in the loop about how it goes. Until then, happy motoring to you and yours!

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