I did my timing belt myself a few years ago. (15 years experience in the auto repair field.) I took out my radiator to gain extra space.

Rusty, when I put my belt on I had it off one tooth. It wouldn't accelerate for anything and idled a bit rough. Sounds like you may be off just one tooth. I was extremely careful lining up the marks and still got myself a tooth off, LOL. Things happen.
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Blessed are the Peacemakers. . .