how much is my Cadillac converter sensor cost

3.0L? wires are crossed. firing order>>1-2-3-4-5-6... THE distributor cap is numbered.... the engine goes like this.. back 3 on engine are 1 3 5 front 3 on engine are 2 4 6 cap is numbered so attach the right number on the cap to the engine.

Sounds like it could be a coil. Bring it in to the shop and we can further diagnose this concern and get it corrected.