Toilet flushes slowly, but no visible clogs...
In an upstairs bathroom, the toilet does not flush down as it should. The water level in the tank is where it should be and all 22 of the drain holes in the rim of the bowl are fully open. When you flush the toilet, the water comes down out of the tank into the bowl as it should, but the water level simply rises. It does not flow out over the top of the bowl, but simply "whirlpools" for about thirty seconds and then slowly goes down by itself.
I have checked for leaks, and used a toilet-auger on it with no sign of any internal clogs. I replaced the flapper yesterday with one of these kinds where you can select nine different settings, and I put it on the setting that allows maximum water to come down out of the tank, but this did not help.
The only thing I've seen that seems out of the ordinary is that the water level in the bowl when the toilet is inactive seems high. I wonder if this upsets some "vacuum" creation that is necessary. BTW, the toilet in the downstairs bathroom works perfectly.
I've looked all over the web and picked everyone's brains at Ace Hardware and no one can come up with an idea of what's going on with this toilet.
Any help you can give me would be greatly appreciated. I was forced to "retire" from corporate America two months ago and I don't have a ton of money to pay a plumber. Thank you!