I redid my bathroom in my mobile home because soft spots in the floor. After replacing the toilet it worked fine the first couple of flushes then the bowl fills and it just slowly drains. At first I thought I must've seated it wrong and somehow gotten the wax ring to block the drain.

I've since pulled up and re-seated it and now I'm sure that's not the problem. Each time I replaced the toilet it would flush like normal 3-4 times then back to slow draining.

I'm at a loss, I thought maybe my waste stack is blocked or there is some venting issues.

I've tried dumping a bucket of water in the toilet, no change. I've tried removing the P trap from the sink, no change. I got on the roof and other than a small hornet's nest I cleared I could shine my flash light in and saw no other obstructions.

Pictures are below, any help is greatly appreciated. I have no issues with the shower and the sink. Sorry, Imgur isn't sending me a Phone Verification code.

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