So here is the deal. I just swapped in my spare obd2 b18b longblock into my 94 si. Swapped over alternator, dizzy, obd1 p75 yada yada... I also swapped over my entire fuel rail from my obd1 b16 onto this LS. (AEM fuel rail, stock obd1 injectors, FP gauge, and AEM fpr.) It all worked prior to swapping over. Well, I got the car running today, no problems, no leaks, no anything. Had a CEL but ran fine. It ran great on my way to and from getting gas, brought it home, shut her down to check the CEL and it was for fuel injector, code 16. Started her back up and ran terrible.

With the car running, i unplugged each and every injector, one at a time, and they all made the motor run worse, which is expected.

I took apart the entire fuel rail, took injectors out, even replaced some of the seals, inspected everything, and reinstalled.

I then checked the ground on the thermostat housing, it was tight, but just for kicks i took it off, and took a wire wheel to it to clean off some corrosion a bit and tightened her back up. All the rest of the wiring looks good.

Still runs like crap, and showing code 16.

Fuel pump primes, car starts after about 10 seconds of cranking, and continues to run like poop.

Help me out guys, Searched but came up with nothing.