Hello,
There could be a few causes. Since it has set for a year do you know if it had a gas preserver put in it like Restor, it's a preservative that is used when automobiles, lawn mowers, outboard engines etc that won't be run for a long time. If not sure then one cause could be bad gas and need to put fresh gas in along with a cleaner and just run it for a while, this would be the first thing I would do. If that doesn't do it then possibly the the Spark Plugs, another possibility is a vacuum leak.
If you engine light is on could go by an auto parts store and ask them to check codes. Write them down and post back here.
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Saturday, June 6th, 2015 AT 4:51 PM