Last year a problem that occurred once many years ago on this low-mileage 1988 GTA showed up again- all of the injectors on bank 2 of the engine do not fire. It was intermittent and then became consistent. I am trying to resolve this problem, but am stumped as to what to try.

Data:
Stock engine. 34,000 miles. Garage kept. Original parts except alternator, belt, and battery.
Minimal weathering and corrosion on vehicle.
Right exhaust manifold stays cold.
Injectors on right side do not click. Left side all do.
Car runs amazingly well after warming up, but is obviously crippled.
Swapped INJ1 and FP/INJ2 fuses and no change.
Throwing codes 21, 22, 33, 34. It was throwing these codes intermittently before, too, but always went away in past.
Cleared codes and restarted. Behavior continues, but no codes.

I would be grateful for any suggestions about how to chase this problem down.

 

Are these the original injectors? You may want to OHM them and see what you come up with. If I recall correctly they all need to be around 12 ohms =/-1 ohm. If you have one high the ECM may not like that and is not firing that bank because of it.

 

I had one injector go bad on a 92 my daughter had, and I unplugged one at a time and when I hit the bad injector it leveled out except for a miss.

 

Thanks for the ideas, folks. I traced back the wires to the ECM to verify continuity and after reconnecting the right side is working again. A bit of a misfire now, so moving on to checking each cylinder...

 

I hate it when a fix is to disconnect and reconnect, but doing that with the ECM seems to have solved the problem. The misfire was because I swapped 2 and 6 spark plug wires...

 

Thanks for the update. Glad you got it.