Stool drains slow, drain pipes are clear, water flows freely from the tank into the bowl
Removed stool and backflushed... poured large bucket of water into bowl while removed and the water rain out quickly.

While you had the bowl out in the open you should have someway gotten a small cord all the what through the trap, then you should have tied a hand towel on to the end of the cord and bulled the towel back through the trap to make sure that the bowl did not have any obstruction in it.

Does the water rise high in the bowl when you flush it? Then how long does it take for it to empty. Do you have plenty of water in the tank before you flush it.

Is this on old commode or one of the new 1.6 gallon commodes.

Does the bathtub/shower/sink drain good?Look under the bathroom sink at the trap ( drain pipe) look like a P or and S and go through the floor? We van get a fuller picture on the vent system which can greatly affect the tolit also and not be a wet vent setup. Or were back to the johnny.

While you had the bowl out in the open you should have someway gotten a small cord all the wat through the trap, then you should have tied a hand towel on to the end of the cord and bulled the towel back through the trap to make sure that the bowl did not have any obstruction in it.

Does the water rise high in the bowl when you flush it? then how long does it take for it to empty. Do you have plenty of water in the tank before you flush it.

Is this on old commode or one of the new 1.6 gallon commodes.

This is an older commode. Yes, the water does rise in the bowl and it takes it a little while to do down and it never goes all the way to the botton of the bowl. There is plenty of water in the tank.
Could the air vents be stopped up and causing the problem?
Thanks for your help

Yes, you could have a plugged vent stack but do you have any gurgling, telltale sign of a plugged vent.

Bathroom vents almost never get clogged unless a bird makes a nest in the vent pipe or eggcorns hit that little hole enough to block the vent. An older johnny is good for flushing. Iam still waiting on the sink and trap question. This could help show how the bathroom is vented and if it's a wet vent system. Do you have childern that could have thrown a toy in the jonny? Bars of soap are the most common. Did the bowl drain before and does the bowl drain different when you run the tub or sink. ( helps test for vent/wet vent) The best test and you need a wax ring to reinstall is pull the johny and pour water directly in the 3" closet flange and see how that does. New wax ring $1.00 item If it slow in the direct hole I say vent problem or another object in the line itself. At least this will narrow things down. Look in the bowl and see what's there and wire it up in. sometimes this doesn't work and it's a total jam job.

While you had the bowl out in the open you should have someway gotten a small cord all the wat through the trap, then you should have tied a hand towel on to the end of the cord and bulled the towel back through the trap to make sure that the bowl did not have any obstruction in it.

Does the water rise high in the bowl when you flush it? then how long does it take for it to empty. Do you have plenty of water in the tank before you flush it.

Is this on old commode or one of the new 1.6 gallon commodes.

Thanks for your help I removed the stool again to do tile work and I pulled t
A rag through and there are no obstructions.
With the tank off and the stool sitting on a metal wheel I poured 3-4 gallons of water in the hole where the tank sits, the water rose about half way up in the bowl and stayed there. If I keep pouring water in the hole the water continues to stay at about half level
Later I poured 3-4 gallons of water directly into the bowl, immediately the water rushed out and all the water left the bowl, there was a gurggling sound and the water stayed the proper level in the bottom of the bowl.
I have cleaned out all the air holes and water freely flowed from them when I flushed the toilet with the tank installed.
I am ready to buy another toilet but I sure would like to know the problem with this one.
It is an older toilet and had worked all right until recently.

Thanks again for your help and anyone else who might have the solution.
Jaywill

While you have the toilet off. Pour a five gallon bucket of water down the drain where the toilet sits(as fast as possible). The water should go down as fast as you can pour it. If the water backs up at all, you will need to auger the drain.

If you get to the point to get another toilet take old out side ( goggles) break the back of the bowl part that sit o the ground and see if you find sometning in its channels Then you know 100% sure if there is something in the ( tube) areas and now its broken up for disposal

If you get to the point to get another toilet take old out side ( goggles) break the back of the bowl part that sit o the ground and see if you find sometning in its channels Then you know 100% sure if there is something in the ( tube) areas and now its broken up for disposal

Great idea... should have done that to begin with... my daughter is a doctor, maybe I can get her to x-ray the thing to see what is wrong... just a thought, or I could just buy a 5 gallon bucket for the renters since it works good that way.