maximilian_lion1

Tiburon engine running rich

Having issues with my 2002 Hyundai Tiburon, gasoline engine. Feels like the engine is running way too rich. I've noticed a drop in power, the check engine light is on, and the engine is running really rough. Plus, my fuel consumption has gone through the roof, and it's jerking when I try to accelerate. I'm thinking it might be a defective fuel injector valve, but I'm not sure. Any ideas?

A 2002 Hyundai Tiburon is experiencing issues with running rich, leading to a drop in power, rough engine performance, increased fuel consumption, and jerking during acceleration. The initial suspicion was a defective fuel injector valve. Suggestions included checking the oxygen sensor, air filter, and spark plugs, as these could also cause similar symptoms. Ultimately, a mechanic confirmed the issue was indeed a defective fuel injector, which was replaced, resolving the problem.

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4 comment(s)

I had a similar problem with my Tiburon. Have you checked your oxygen sensor? A faulty O2 sensor can definitely cause a rich mixture. Also, when was the last time you replaced your air filter and spark plugs? Those could also contribute to the problem.

Thanks for the quick reply! I replaced the spark plugs about 20,000 km ago. The air filter is newer, about 5,000 km old. How did you know it was the oxygen sensor in your case? Did you have the exact same symptoms, including the jerking?

Yep, the jerking was the biggest clue for me, along with the terrible fuel economy. I'd definitely get the oxygen sensor checked out. Honestly, if you're not comfortable doing it yourself, take it to a trusted mechanic. Could be other things like the fuel injectors as you initially suspected, but a diagnostic check will pinpoint it.

Thanks a lot for the advice! I took it to a mechanic, and you were right – it was the fuel injectors! They replaced the defective injector. The final bill was 515€. Runs like new now!

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HYUNDAI

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TIBURON