Running lean between shifts. Wideband runs dashed lines between shifts and upon decel after decent acceleration. It has just started doing it in the past week or so. Vac is at -18hg. Car runs the same as it did before, don't feel any differences. Tried to pull codes to see if I have anything, but the obdI doesn't even blink after I push the button, so I assume that I don't have any codes stored.

I do seem to have excessive crank pressure since I have smoke from the dipstick and oil sneaking out the fill cap, but I think that's from the catch can's inlet and outlet being too small, going to fix that this week.

Any ideas where to start or what to check first?

 

That is pretty much normal. Mine goes to dashes between shifts and when letting off the gas.