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Strange car shaking on start up, any ideas

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Hi everyone,

Been having a problem with my 99' boxster. Recently, when I start up my car, the engine would shake and then sometimes it would shut off. Then i'd have to restart it again, it'd do the same thing again and shut off. Usually after the 3rd time starting it up, it works fine. It drives normally with no problems and never shuts off once I pass the initial start up problem.

Over the past several months, i've also had on and off check engine light that comes on and off, it'd come on for a couple of weeks then off for a couple of weeks. Not sure if this may be related or not.

Of note, i changed my MAF sensor a year ago by myself (had no problems after the change that I know of) and also recently had my oil changed (3 weeks ago).

Any ideas as to what may be causing this problem?

Thanks, mike

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