By disconnecting the hose to pcv you are allowing more air to the engine by creating a vacuum leak. I still think even tho the throttle body has been cleaned there still may be a problem there.
The tank does need to vent. The pcv just reburns crankcase pressure and fumes by sending it through the motor again. So it is really strange that it does that. The pvc valve should rattle when you shake it and i think it should only let air pass from the engine to the body and act like a check...
I think usually if the is a vacuum leak the engine will not idle down it will rev. How about fuel supply or pressure. Also on the throttle body at the butterfly there is a small hole or slot to flow air for the idle circuit make sure it is clean and the is no carbon ring on the edge of the...
I have a small tank fuel sender new in the box it came with the jeep when I bought it and it is for a 15 gallon tank. The tank in the jeep is a 20 gallon plastic. Sell or trade