What are you using to read codes?

Also, there is no detectable hissing noises. Have seen some people using carb cleaner, seems random.  There is not much room to do anything on the right side of the motor. 

Posted previously for variety of tune up items.  Had trouble finding vacuum port, had to use the one of the throttle body, disconnect purge valve.  Hopefully that is adequate to get the a good reading.  I am seeking peoples' experience with the operating range.  The vacuum at idle, full operating temp is barely 16.5.  It seems to be around 16 in drive with foot on the brake.  The idle is quite bad.  The needle is Very steady at idle.  When reving the engine, short blips or more duration, the needle immediately returns to resting 16.5 or so.  That seems good as far as the engine is concerned.  Is this range pretty low?  The specs seemed to be 17-21 or 18-22.    This has had a progressively rough idle over the last couple weeks.  The car is now bogging, almost stalling when driving into a parking space after driving in town.  It corrects itself so far, does not stall.    Has anyone had their typical vacuum around 19-20 vs this reading?  Might it be a good idea for it to take up a temporary smoking habit, or smoke test.  Some people posted using cigars with various methods.  Think I would prefer the one with a fluid pump vs smoking the cigar.  I do not have a smoke machine.    I posted a long list of tune up items previously.  I re ran the vac test; think it was a better connection on the tbr.  I plan to drive it for a while so the extensive tune up items seemed prudent.  One big item was the lower 02 sensor that was always stuck on .8 volts.  The current one, though not as active as the uppers, has a lot more dynamic voltage now.   Basic fuel trim readings are below .5 for short term and long terms are fairly equal.  When running the engine at about 3500 rpm, the readings are steady, do not go way up, looking for fuel.  I had some concern that the fuel pump may be involved as it has 170 on it.  This process may be useful to someone else who is dealing with a rouge idle.    I believe the gas mileage is a bit worse right now also.   

Do not forget to reprogram your tire size so that the speedometer, odometer, driver assistance, and safety features all continue to work properly. A one inch change will not affect much, but it is worth noting.

i'll just pick up a set of glossy blacks vs getting them painted as they are beat up over the last 8yrs.

I'd rotate the tires. If the noise moves, then you have found your problem. If it stays the same, then there's something else going on. But the rotational noise you're getting could just be bad tires.

20s may be easier to find than 19s but I agree that the tire may not do so well off road. Could always get your stock rims painted!

What codes are stored?   Does it happen all the time?

Yep, this is exactly what i am planning out but was on the fence between amber & white but am bending towards the amber.  stock chrome rims are still on also, will be getting some nice black rims after winter.  stuck on though if i want to stick with the 18's or upsize to 19's.  i do work that takes me out on the grids sometimes so i am not sure how the 20's would fare with less rubber on the rough roads.

PTU was not the source of the noise, nor were the wheel bearings. Both were replaced. Where to look next?