1996 cutlass ciera, 2.2, GM PFI, 186K miles


I replaced all the fuel injectors as there was gas in the oil, (i had already replaced the FPR and checked everything else) and I got a great deal on 4 brand new ones.


I crank her a few times and she hydrolocks. I pull plug #4, and crank it again. Fuel shoots out in a geyser. Yep hydrolock. I pull the remaining plugs and crank her again, the remaining 3 cylinders were full of gas too.


I then pull the fuel pump relay, and clear out all the gas. (summarily making the garage a toxic area) and rent a noid light set to further diagnose whats going on..


I crank the engine, and the noid light refuses to flash, or even activate, regardless which harness its plugged into. Now I have to note I have the ICM unplugged due to something else, but I doubt that would keep the noid light from working?


I then check voltage at each of the harnesses, (key on) I read 14.5 volt constant on one side, 1.5 volt constant on other side. Each harness was the same. (key off) I read 12.4 volts constant and 0.15 volts on the other.


I then pulled the inj coil fuse (which I assume is the driver?) and I get key on or off 0.05 volts on one side and 0.00 on the other..


Is my driver or ecu bad? The old injectors were squirting fuel into the oil, or so I am sure as the fuel pressure when tested even with a new FPR leaked down in about 2 minutes. Now with healthy injectors the fuel is an ocean!