i have a 86 mustang gt with an alpine cda 9811 ive checked the groudn and harness and power everything is fine. the radio is bolted by a stainless steel bracket holding the back. it skips on bumps. as soon as it hits one bump its gonna start skipping on the next and the one after until theres no more bumps. it doesnt seem to do this when i just started the car after 30min or so. what could be wrong? i havent installed the metra kit. i really like this radio and i would love to fix this problem. you guyz r the experts im just a noob im open for nething thanks guyz
