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Does your uncle work at an actual dealership somewhere? If so, maybe he can borrow the obd-II scanner from a mechanic so you can take a look at what code it is throwing.
Like a few guys have already said, rough idle could be a serious problem or just in need of a clean air filter and new sparkplugs. My car idled kinda rough, but not too badly when I first got it, I changed the plugs to NGK and changed out the old air filter (literally caked brownish-gray in crap) and now it idles much better.
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