update on power loss
I installed a new PCM. I'm still having the same issue. I did get an error code again. 172, engine running lean. I'm no longer getting EGR error codes. I have the issue after putting the engine under heavy load, for example, going up steep hills. I did a vacuum test a while ago, but I wonder if under extended heavy load, something is leaking a sucking in air. I've replaced almost every sensor already. What's a likely culprit if I have a leak? Maybe the PCV valve?