any input from anybody would be greatly appreciated. thanks in advance. the car is a 95 f body with a lt1 and a 0411 pcm and a 24x conversion head work, cam, long tubes, injectors and so on. one day bank 2 runs crazy rich and I checked a few things. assumed it was the injectors. swapped the out with some spares and same problem. So I swapped o2s and widebands side to side and same problem . test wiring. all seems well so I run a scan and find when the car warms up I lose o2 signal on bank 2 and that's when it goes wacky. trims spike and wideband maxes out. test, swap and retest everything again. same thing every time, car warms up a bit, meaning I drive it a mile or so and then it loses o2 signal on bank 2 and trims spike. swapped o2 wires at pcm pins to see if it is a pcm problem and if it changes to the other bank, during that I sat in the car with the scanner on it and looking at the data, I pushed the throttle and when the tps changed the trims on bank 2 spiked when the car wasn't running. since trims are calculated from various other inputs I assumed I had found the problem and we have a short circuit between the tps and something. started unplugging sensors 1 by 1 and no change . down to everything unplugged but the tps and it still does it. So I checked pcm powers and grounds, voltage drop tests, the works, no issues, opened up the harness and inspected it all, no problems, double checked all of my harness all of my battery, body and engine grounds, nothing, went home slept on it and in the am it wouldn't even start!!! wtf injector pluse width was over 26 trying to start??? found a blown injector fuse and it runs. So i ordered a pcm and installed it, programmed it, and BAM, same thing
I'm sure im forgetting details but that should be enough to start with