My 93 jeep cherokee just stopped running fuel pump kicks on, new plugs and wires.... will cranks and crank but actin as if its not getting any fire or fuel any ideas? I will broke replacing everything it needs and dont have that kind of money.

An engine needs 3 things to run. Fuel, Air and spark. You've checked the spark so move onto the air and fuel system. I'm assuming you did a full service on the replacement engine after you fitted it? Even a dirty Air filter can cause bigger issue that you would expect.
Have you checked to see if the engine is getting Fuel? If it is just turning over and not trying it might not be getting fuel to the cylinders. When you checked the plugs for a spark were they wet and smell of fuel when you first took them out?
Have you had the vehicle scanned with an OBD2 scanner for trouble codes? These can give clues to what and where the problem might be. If you have to pay for the scan get prices at 4 or 5 different places as prices can be VERY different.

Take 2 screws out of PCM and replace with shorter ones

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maybe cranksensor

Let me be clear here. Crank means turn. Ignite means start running. So it will crank but not ignite and ur sure u have 35psi of fuel pressure. Next is to have someone gently wiggle the wires at the engine control unit while u turn the key

Could be the crankshaft sensor, if your not getting spark to the spark plug wire's, could also be fuel pump if you are getting spark to plugs.

Check spark at plugs. If no spark consider coil.

check for fuel pressure, does the fuel pump work while cranking??

fuel pumps bad i bet

My 98 Cherokee was the exact same. I used to have to turn the key back and forth 3 times and then it would start. Otherwise it would just crank and crank for a while and then start. Pretty embarrassing! Took it to the dealer and they said that my fuel pump was losing pressure. I changed the fuel pump and I don't have to prime the pump anymore.

Could be a sensor.I'm thinking more along the lines of a fuel pump or fuel filter.If the fuel pump is going bad..similar symptoms.Would be advisable to install a pressure gauge at the engine,and check fuel pressure when it's acting up.