I have a 4.3 liter that is a reman. It has a GM CD distributer. It will not advance the timing under load. I have checked the module at Advance Auto parts and they say it passes all the test. This distrubuter has three wires coming out of it. On one plug is a black wire I believe goes to the cut-out switch. The other two are brown and pink, they run to the coil. Is there supposed to be something else in the mix? I am scratching my head at this point. I can add that the cut out switch is an older version and am wondering if this could be the problem maybe I need the newer type that is now on Mercruiser boats. Any help would be appreciated. I can also say that there are no external modules or amplifiers just the parts that I named.