I added gum out with pea injector cleaner into my 2004 CTS with 140,000 miles and the next day I got a bad misfire codes po205 po300 and po305. I changed the coil and the plug in cylinder 5 nothing changed before pulling my intake to check my injectors, I checked my computer. I have no voltage 2 pin number 47 which is my number 5 cylinder injector. Should I change my ECM because of a bad driver
It is also unlikely that the timing is that perfect that you added injector cleaner then your ecm fails for an injector problem. Sounds like that cleaner pissed off an injector or two(or more)
try swapping the #5 injector into another cylinder.
I can't access my injectors unless I pull my entire intake manifold. That's why I tested the ECM. And if I have to change the ECM there's no reason to pull the intake. I'm under the impression ECM is a common problem on this Cadillacs. Is there any way to reset the ECM or if the drivers not working it's toast
I don't think injectors work on DC voltage. They get AC pulses. Unhook battery to reset ECM.
Actually show voltage at all other five cylinders at the injector harness. But nothing for cylinder 5. And the same thing at the ECM for the other cylinders but nothing for cylinder 5 injector
did you measure at the ECM with the injector plugged in, or unplugged? There could be a short inside the injector.