Hey guys. I just got done replacing the pcm in my cousins truck. We switched from a 99 to an 01 pcm on his 99 silverado. The injectors and all the tables to go along with the injectors were matched from the 99 file. Now heres the problem. Its got a really rough idle and seems like it wants to die all the time. The fuel trims on bank two are maxxed, the bank 1 looks great. Also the injector pulse width is twice the amount on bank two as it is on one. Does this seem like an injector is either clogged or no longer working. Could it be a coil pack? For a short time we were getting the misfire code on bank two. Also could clogged cat be the problem, i know his cats are getting clogged by the sound of his exhaust. I see a bit of black smoke when he takes off from an idle also. Any help would be appreciated.
Chris