This is a long one. My Cherokee (stock 4.0 in-line 6) had problems starting.
1. REPLACED FUEL PUMP (WAS NOT COMING ON)
-CONTINUED NOT TO COME ON UNTIL ABOUT 5 MINUTES INTO TRYING TO START IT, SO I DEALT WITH IT.
2. HAD ONE OF MY GUYS CHANGE THE BATTERY, PLUGS, WIRES (THEY STAYED IN THE PROPER LOCATIONS) AND I WIRED UP MY OWN RELAY FOR THE FUEL PUMP (THE ONE ON THE FUSE BOX WAS NOT WORKING PROPERLY)
3. GOT IN AND WOULDN'T START.
4. REPLACED THE CRANKSHAFT POSITION SENSOR.
5. REPLACED CAP-ROTOR, DISTRIBUTOR.
6. STILL HAD NO START, NO POWER.
7. JIGGLED A WIRE COMING OFF OF THE GROUND WIRE GOING TO THE BATTERY AND IMMEDIATELY GOT POWER.
8. TRIED TO START AND THE BOSS SAID THAT TIMING WAS OFF.
9. GOT IN AND GOT EVERYTHING LINED UP AND STILL NO START.
10. BASICALLY I WENT THROUGH AND DID ALL OF THIS OVER A LOOSE GROUND WIRE AND CAN'T GET IT TO START.
Maybe i do have it off time, now that i've messed with it. Technically that's the only thing that has been tweeked.

any advice?