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Fuel, Spark, & Compression(with air); These are what you need to have a nice start. So, a failing fuel pump may not deliver the right amout of fuel to give a clean start. So the answer is yes, a failing fuel pump is a potential cause of a rough start. A 2008 is pretty new, so you might expect the electrical system and spark plugs to still be OK (replace plugs at 60k miles for the Elantra). Your air filter could be really clogged. Your fuel could be contaminated. I'm sure there are other causes, but most of them would cause other symptoms after the car starts - like rough idle or misfiring.

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Q: Will a failing fuel pump cause a 2008 Hyundai to have difficulty starting?
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