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Land Rover Discovery Diesel Injection Nightmare Help?

Unsteady engine

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Stalling while idling

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Poor fuel economy

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Engine shuts off by itself

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Loss of engine power

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Jerking on acceleration

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Check engine light on

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Black smoke from exhaust on acceleration

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Strong exhaust smell

Hi everyone! Having serious issues with my '03 Discovery diesel (87k km) and not sure if I should trust my mechanic's diagnosis. The engine's running rough with black smoke on acceleration, loses power, and occasionally dies. The check engine light is on and fuel consumption has gone through the roof. My mechanic mentioned injection problems, but after a bad experience with them last time, I'd like to hear your thoughts. Has anyone dealt with similar symptoms? What was the actual problem and how much did the repair cost? Thanks in advance for any insights! -Mike

4 comment(s)


SanHo92

Hey Mike! I had nearly identical symptoms with my '06 Range Rover TD6 last year. Black smoke, rough idle, poor acceleration, and terrible fuel economy, all the classic signs of a faulty injector. My mechanic confirmed this with diagnostic testing. In my case, one injector was completely shot and had started leaking. It was causing unburned fuel to enter the exhaust (hence the black smoke) and throwing off the whole combustion process. These injector issues can get serious if left unchecked, they can lead to carbon buildup and potentially damage other engine components. The repair involved replacing the defective injector and cleaning the fuel system. It wasn't a quick fix, took about two days at the garage, but it solved all those symptoms. Since the repair, my engine's been running smoothly with normal fuel consumption. If your symptoms match these, I'd suggest getting a second opinion from another shop that specializes in diesel engines. Injector problems are pretty common in these engines, and it's worth getting it sorted properly. Hope this helps!

WeberDriver (Author)

Hey there! Thanks for sharing your experience with the Range Rover TD6. You've just described exactly what happened to my Disco! Really good to know I'm not alone with these symptoms. Quick question, do you remember roughly how much you ended up paying for the injector replacement and cleaning? Also, has everything been running smoothly since, or have you noticed any other issues popping up? Just trying to get an idea of what I'm in for cost-wise and whether I should be keeping an eye out for anything else. These diesel engines can be tricky beasts! Cheers!

SanHo92

Hey again! Glad to help out! Yeah, I went ahead and got it fixed last week, best decision ever! The whole issue with the injection system is completely sorted now. My Range Rover TD6 is running like a dream again, no more black smoke, rough idle, or any of that drama. The total bill came to 515 € for replacing the defective injector, which honestly wasn't as painful as I expected. Since the repair, everything's been perfect, smooth running, normal fuel consumption, and the engine's got its power back. No other issues have cropped up at all. I'd definitely recommend getting it sorted sooner rather than later. These injection problems can cause more expensive damage if you leave them too long. Plus, it's such a relief not having to worry about the car dying on you anymore! My mechanic did a thorough job cleaning the fuel system while they were at it, which probably helped prevent any follow-up issues. The engine's purring like a kitten now, almost feels like a different car! Let me know how you get on with yours!

WeberDriver (Author)

Thanks a lot for sharing those details about your repair! You know what's funny? I actually just got back from the mechanic yesterday, and I've got some good news to share. I bit the bullet and took it to a different garage, one that specializes in diesel engines. Turns out you were spot on about the injector! They found one bad injector that was messing up everything. Cost me about 480 € for the replacement and cleaning, which wasn't as terrible as I'd feared. The difference is like night and day! My Discovery's running super smooth now, no more black smoke or unusual stalling. Fuel consumption's back to normal too. The mechanic did mention I caught it just in time before it could cause any serious damage to the engine. Really glad I asked here before going back to my old mechanic, saved myself some hassle and probably some money too. These diesel engines really do need someone who knows what they're doing. Thanks again for the help, feels great to have my trusty Disco back in proper working order! -Mike

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