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

606 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 ago馃槱 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
Guess I'm blind, didn't see the info posted under your ID, but how about the engine size?
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