I may be needing one of these as well. Tach goes to zero and check engine light comes on. Stays that way or works and doesn't work intermittently. Doesn't want to start when engine is warm. Just replaced DIS and that didn't fix it. I'm guessing either crank or cam sensor (both of which were replaced with new parts in April).
If it turns out I need a crank sensor, has anyone found a source or have any ideas on something we can use as a replacement or a fix? Otherwise our cars are expensive paperweights?