I am having a trouble with our matrix 2003...since it experienced an overheating, it causes a lot of headache now...we were able to replaced the coil, cam shaft sensor, crank shaft sensor, fuel filter, radiator, fuses and spark plugs, but it seems nothing happens...it still make "kadyot2" when running as if the fuel or power are distorted...any help from hyundai experts? or matrix specialist? thanks!