throttle lo limpie y los RPM no son estables on 2009 Chevrolet Cobalt SS

tenia problemas con los RPM tube que limpiar el carbulator pero ahora los RPM son estables y medijieron que no usan carburador este tipo de carros ahora quema mas gasolina y aveses se escuchan estallidos por el mofle

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1 answer
your vehicle warranty should cover this. take to your dealership.