I have a 1991 z28 camaro with TPI and i was driving the other day and it stalled and died. I pulled off the fuel rail and when I crank over the motor only the passenger side bank of injectors work. I have power at the fuse and 12volts on the red wire that goes to the injector. If anyone has a schematic or info for troubleshooting this that would be great.

 

I don't have a schematic for 91 TPI, but what I do have for 86 TPI and maybe 89 TPI show both banks getting power from pink/black wires.
If you are sure you have a good +12 volts to the injectors, then I would suspect that the ECM is not supply the ground needed to fire the bad bank. You might have a bad transistor inside the ECM.

 

Could just be a bad wire too.

 

You have two fuses for the injectors, they are marked INJ1 and FP/INJ2 on the fuse block. One is probably blown.

 

Both the fuses are good. I also borrowed a friends computer and it does the same. This seems to point out a bad ground wire maybe? how would i go about checking this? thanks

 

Okay Danny,

Take a look at this and see if it helps you.

 

Look under your dash hushpanel at the passengers feet, there near the ecm you will see two black connectors that look just like each other, one is for each bank of injectors,
Look and see If there connected tight