Recently bought a 95 Cherokee Sport 4.0 automatic. First thing was to swap the exhaust manifold. Done and it all looks good. Now it won't start. Lights, dash and warning all work as well as the annoying buzzer. Quadruple checked the connections, cleaned battery posts, charged battery, tried jumping, banged on the starter, I can hear the fuel pump fire off. Nothing. No click no sound from the starter. I have only driven this a few times and one time after filling with gas had a problem similar and rattled the battery cable which I have since replaced. Thoughts?