hey. I have checked codes, and i either have no codes or crank sensor. how do you test crank sensor??

You need a analog muti-meter. Unplug the crank sensor and crank the car, it should not start. If it does something is truly wierd, then disable the fuel injection. Haveing someone else crank the engine, with the AC meter on the lowest range, crank the engine You should see the meter needle jump. I forget the pattern as my manual is not here right now, but I know it is one, then two, then i forget what it is.

 

Another possability is that is is as simple as a bad connector or dirty connector.