This is like the umpteenth time I've asked, and I owe you guys a beer.
When the weather got cold, my engine started idling with some more noise. I suppose it could just be severe lifter tick, but this is on totally fresh oil - changed it last night. Rotella T6, 4 quarts, new napa gold filter.
Does it sound OK, or is something up?
For reference, the same engine when I first installed it sounded like this:
I got an intermittent rich code (p1170) twice, so I used my obd2 reader and watched the MAF and O2 output, both of which looked good. I read the fuel pressure regulator can push out too much fuel when it goes bad, and you can test it by pulling the vac line to it and verifying no gas comes out?? I did that, and it passed.
The EGR valve seemed to be leaking fully closed, even after cleaning, though, so I swapped that out for one from the partsgroup, didn't really seem to do anything, although I haven't gotten the code again, so that could have been the explanation for running rich...
Again, not even sure there's a problem, I just would really appreciate some other ears on my engine.