I have a 2005 chevy malibu classis it has 116,000 miles on it I started out with 86,000 miles I've had it for two years and it's been a very reliable and good car. But recently when you start it up it skips I replaced the coil and sparks plugs but it's

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Still skipping as you get going down the road I fine it changes gears fine but the check engine light is on. It started miss firing the other night but hasnt did it sense I got someone to check it yesterday and they said was the injector leak?