motorvac?

[bristma]

a friend of mine took his 95 honda civic to get the oil changed,and they also sold him on cleaning his fuel injectors with the motorvac system.after finishing the procedure he heard a knocking sound and when the mechanic tore the motor down he found a bent rod on#1 cylinder.my Question has anyone out there had this same thing happen to their vehichle? as in someone not following procedures with this machine.