I have 1995 geo tracker. cranks over but doesnt start. would it be coil or fuel problem?

You need to conduct tests to be sure where the trouble is.
1. Spark test: remove the number one spark-plug, and hold it to the engine block. then ask a friend to crank up the engine..
2. If the system is good, you should see steady blue sparks. If you don't, then you would have to work on your ignition system.
3. Fuel test: get a can of 'starting fluid' or the common 'choke and throttle-body cleaner'.
4. Unbolt the clamp holding the air-intake hose to the throttle-body. Pull back the hose to expose the inside of the throttle-body.
5. Spray a good quantity of the cleaner into the body.
6. Re-attach the air-intake hose, and try to crank up the engine again.
7. It will show some hesitation, but keep cranking until it fires up, and able to idle.
8. If the throttle-body and the manifold are dirty, the choke cleaner should help.
9. Please get back to me if necessary.