Engine problem

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I have a 95 eclipse GS-T, earlier today I launched it. Alittle bit after that my car started shaking when I shift it and kind of dies down after I get to higher RPMs, and the check engine light went on. I looked under the hood, none of the vacuum lines were detached or anything. The engine shakes and the RPM goes from about 400 and jumps to about 600 repeatedly.
Does anyone know what this could be?
Please help