REPLACED THE CRANK SHAFT SENSOR NOW WONT START IM LOST
You make it sound as though that before you replaced the crank sensor that it WOULD start, but I'm thinking that makes no sense or you would not have done that in the first place. Easter-egging parts to repair vehicles is a costly, often losing proposition. You are better to either:
1. Properly go through the process of determining which of the four necessary components is missing before swapping parts, or
2. Pay a mechanic to do it for you.
You must determine what is causing the no-start condition. There are four components required for an internal combustion engine to work:
1. Fuel
2. Air
3. Spark
4. Compression
If you get a can of starting fluid, you can spray some into the intake while cranking the engine. If it starts, you have 2, 3, and 4. If it doesn't, then you must look deeper.
Air is usually there. It is almost never the problem, so ignore it for the most part unless the vehicle starts with the air cleaner removed.
Spark can be the hardest to determine, especially since vehicles are computer-controlled these days. A failed crank sensor cam sensor/pickup coil, ignition module, ECM, or even the vehicle security system can result in no spark.
Fuel is easier to determine, since you can listen for the fuel pump to dun, and can usually check for fuel at the fuel rail. However, there is the possibility that the ECM isn't firing the fuel injectors, so even with the fuel right up to the engine, that is no guarantee of fuel to the cylinders.
For these reasons, if you are not equipped a fairly good knowledge of modern engine controls, and don't have the equipment to test and monitor the engine systems, you may well get off cheaper to have a mechanic do the work for you.