Easy test here, unplug the MAF and start the car.

If it starts up and runs fine, then there you go...you found the issue.

Most of the time when the crank sensor goes, your tach with run itself all over the place and end up pegging out at 0, as if the car is off. At least that was my experience with it.

You can get a cheap, used MAF from www.moradpartscompany.com...factory one as well.