Hello, We have move into a house that has a PF/2 enerigizer/ Model 150/430 in
The toilet. It became broken and you no longer can ge the part for it. So we went
And got us a complet fluidmat kit and put it in. But now we have bubble when
You flush and it is very, very week flush and does not go down. It work find with
The other one accept the tiusse sometimes would back up some. Do we need to get a new toilet?

Your toilet itself is likely fine but you have a partial clog. Start by plunging, if that doesn't help then use a toilet auger if the clog is in the integral trap of the toilet. Clogs further down would require pulling the toilet or finding a clean out.