871 code 2312

[Nostalgic]

(10-09-2022 )dhirocz Wrote:  I have the entire IFSM that was removed from the truck during the inframe, so yes. Any way to be able to tell which one it is short of just swapping them one at a time?

The safest way is to swap one at a time. I had a bad one out of the box a few years back and got
a short lecture when I explained how when I unplugged it, the engine smoothed out. Apparently if you do that, the ECM can go into a silent fit and quit controlling them at random and I just got lucky, so I can't recommend it. Of course if yours is dropping out enough to throw a code, the ECM could already be wonky, so even if it runs funky, I'd give it 10 minutes idling before swapping to the other bank. That all said, on mine, when I unplugged the bad timing actuator, the engine smoothed out - and when I plugged it back in, it shook and missed like crazy.