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Heard a loud crack noise when accelerating, felt like lost power while driving after

607 Views 4 Replies 3 Participants Last post by  Turbonut
I was at a stop sign, when to accelerate and heard a loud CRACK or popping noise. Car seems to loose power after and when I turn car off and restart it, it sounds rough Idling. Also noticed when I turned the car off and opened the hood sounds like a hissing coming from under the hood. Just bought this car used a month agošŸ˜© still under the 10 year 100,000 plus an extended warranty. What could this be!!??
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Would be nice to know year, engine, mileage, but unless you purchased it as a CPO vehicle, the second owner warranty only 5 year, 60,000 miles.
Is the check engine light on?
2015 Kia Optima 88275 miles no check engine light
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