ok, here's the deal. Just installed a new motor from a 97 accord into my 96 accord. Same motor f22b2. Just took out the old and dropped in the new. Now new motor won't idle right. surges and shuts down after temp raises to normal operating temp. any suggestions? we've already tried messing with timing. No change. check engine light flashes error code of 5 flashes but I don't know what that means. any help would be greatly appreciated. the sooner the better.