502 mag mpi funny sound
 

funny noise from one tail pipe like a echo sound not a pop but more like bong bong bong sound outher tail pipe sounds find it is dry exhaust i notice that u hear it more at idle did also notice that the idle has droppped off a 150 rpms and the ecu is set at 1000

found the problem pulled the valvle cover it was a broken guide plate sittin in the head never fell down in the motor thank god