car running on 4 cyl

[92mintzx]

I had a rough idle on my car so I cleaned the aic valve with wd-40. It seemed to work. A couple of hours later I took my car for a ride and it was stumbling. I unplugged the coils with the car running and found two cyl made no change. I swapped around coils and plugs and still the same two cyl were dead. I thing maybe two injectors died. One cyl in back on pass side and one cyl in front on drv side. Are they useing the same circuit for the injectors? Why would two injectors just die?

[mtcookson]

Moved, should have some good info in this section.