There was a recall on the 07's for a wiring loom issue going to the TPS. Does yours have this little wiring harness between the TPS and the main wiring harness?
Well that likely means the recall hasn't been done, so were it mine, my first call would be to the local Honda dealer to confirm whether or not the recall has been done.
While that might not be at all related to your problem, if the recall hasn't been done, part of that recall is to replace the TPS with a new one, so if your issue is TPS related you might get your problem fixed on Honda's dime, and get your recall taken care of at the same time.
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