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I have a 2000 concorde 2.7 with 87K miles. I've had the plugs and ignition coils replaced. Also, I've had the fuel injectors cleaned professionally. Engine still hiccups at idle. when the engine does this, the rpm will immediately go up a little. then, it'll come back down to normal. the car doesn't drive any differently. the only thing i've noticed is that if the engine hiccups right before take off, it'll hesitate a little. I've only had the car a few months. The car has never had any descent power. but i just thought that i was normal for this car. any ideas? different people have said vacuum leak, map sensor, pcv valve......I need help.
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Engine hiccups at idle
