i have a 96 SS impala and i just replace the ignition system with a complete MSD set up(cap ,rotor,wire's,coil,distribiter,module,and new plugs), a 52MM throltel body, flowmaster exhaust system, cold air intake, and programmer, since i have done this, car keeps setting a misfire code in system, i have tried to replace plugs, and pluh wire on cylinder that is setting code and nothing has helped any ideas ???? on what to check or look for next ?????