I need some help guys, I 've had this car for a couple of weeks and just put it on the road (legally ) today. I took it for an oil change, it was well needed. right after the oil change i took it for a spin to the store, when i turned it back on at the store the idling was really rough, put it on reverse it shut off. The idling goes down to 5rpm, and slowly shuts off when on Drive or Reverse. Also, to turn it on i have to hit the gas. I was thinking it might be that the oil is too lean 10w30? That was recommended to me at autozone.
Any ideas?

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-Dominicanvirus