to start with I had a brand new belt break and since the check engine light has been on, the codes is the 65590 and 65592, since it has been very hard to start and when it does it runs very rich, it back fires some, it has no power, while trying to do the whole running it above 4000 rpms for a min. to clear the codes, I noticed that the most I could get out of it was 30mph in high gear. It almost seems like its only running on one cylinder and the exaust sounds like its under water. I read that it could be the key way on the flywheel, could there be any truth to this.

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