Jas2on,

Its hard for me to believe that more than one burned out at a time because if one burns out, the others are deenergized. The series GP are like a string of lights, if one goes out, they all go out.

Does the engine run OK otherwise? Are the GP loops physically burned looking?
That could be caused by a bad injectors, but again, It doedn't seem all of then could be bad.

P E H