Chevy 3.8

Would someone tell me what these readings suggest? The following are voltage readings taken at my fuel injector wire connnectors. This is for a 98 Camaro with a 3.8 V-6 engine. I'm getting a P0300B code with the mil light blinking.

While cranking over the engine:

These are the highest readings from the voltmeter. The voltage was fluctuating up and down.
Current Battery voltage at 12.20 volts
# 1 injector 5.80 volts
# 2 injector 5.19 volts
# 3 injector 4.70 volts
# 4 injector 5.50 volts
# 5 injector 5.72 volts
# 6 injector 4.45 volts

With key on, no cranking of the engine:

These are the highest readings from the voltmeter.
Current Battery voltage at 12.0 volts
# 1 injector 6.22 volts
# 2 injector 6.20 volts
# 3 injector 8.95 volts
# 4 injector 6.22 volts
# 5 injector 7.75 volts
# 6 injector 6.23 volts

Would this indicate possible problems with the PCM? I have checked out each wire from the wire connectors back to the PCM. They all ring out OK. I have read that the voltage to the injectors should not drop more than .2 volts or (2/10ths) volts lower than the Battery voltage. In this case, every reading is far below the required voltage value. What is your opinion? Let me know. Thank you, Tommy.

Phate

Sounds to me like a bad MAF sensor. Mine did similar when the MAF was bad. It could be sending false information to the PCM which in turn is messing with your injectors causing a pulsing sensation under throttle, and a bad idle.

Chevy 3.8

Would that condition cause the P0300 code to set with the mil light blinking? Did you have a P0300 code set with your mil light blinking? Thank you, Tommy.

Phate

It would set a p0300 code, but im not sure about the MIL light blinking part.

Chevy 3.8

I just took another voltage reading. This time I went straight to the negative side of the battery terminal for the ground source. Here is what I got:

Current battery voltage: 12.05 volts
With the key on and engine off:

# 1 injector - 11.67 volts
# 2 injector - 11.69 volts
# 3 injector - 11.68 volts
# 4 injector - 11.69 volts
# 5 injector - 11.69 volts
# 6 injector - 11.69 volts

I think this changes things. So, what does this suggest? Does it look like I have a ground problem? How can I resolve this problem? Or, could the problem be with the PCM? I hope someone out there has the answer. Thank you very much for your support.