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As stated, 2014 Elantra runs fine cold, not so fine once reaches operating temp. As long I am pressing down on the gas it runs. Once you let up, say to slow down and try and get back on the gas there is hesitation, almost to the point it wants to stall, but never actually has stalled. There is no check engine light and no codes stored. The car has 87,000 miles and has had regular oil changes since new. Air filter recently replaced. Could this be as simple as new plugs and coil packs? Dirty throttle plate? Thanks for your time and input....
 

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I wouldn't mess with coils yet. Those will usually throw a code.
These should also throw a code but could be throttlr position sensor or throttlebody. Cleaning yours wouldn't be a bad thing.
 
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