i have a 98vhp installed in my 84 f150 i am picking up noise that is so bad that i get no signal when truck is running. i have an electric fuel pump msd 6al2 and a mallory unilight the noise is coming from power side and is driving me nuts. i have tail pipes grounded about 11in from end and tried grounding the radio its self did not help changed plug wires and helped a little but not much need some help or radio is going to come out thanks for help sorry if in wrong section