Cranks but will not start

If it starts with the carburetor cleaner then it should start if the fuel system is working. So first confirm that the fuel pump runs for a few seconds once the key is first turned to run. If not check the fuel pump fuse/s and if okay, try a new fuel pump relay.
If the fuel pump does run, check the fuel injector fuse/s.

If the engine starts with carburetor cleaner or better yet starting fluid, then the ignition is enough although it may be weak, but still enough and if you have gas up to the fuel rail, about the only thing left is the fuel injectors not working. Either they have no voltage to them, like when the fuse is blown, so check to make sure the fuel injectors do have twelve volts to them with the key on run, then if they do possibly they are not pulsing, which could be because or either a faulty crankshaft position sensor or a fault with the power-train control module, so check the power-train control module fuses and you should have the trouble codes read cause you may have a code set that might give a clue. If there is a security light or theft light on, than that is the problem so if it is, try a spare key and if you have none, try cleaning off that key where the pellet is and try it again but if that does not work a scan tool may be needed to check for any security codes to find out what is wrong with the security, if the security or theft light is remaining on past ten seconds or so, or if the light is flashing which means it is even more important.
As far as the weak spark goes, make sure the coil pack is receiving the full twelve volts from the battery.

You are quite welcome!