Installed new distributor. engine starts and runs like crap I have one cylinder backfire. I took and re timed the engine. put the engine at 5 degrees TDC then stabbed the distributor at #1 still same issue. when I advance the engine it runs better but the backfire is more often and sounds like its on two cylinders not one. when retarding the engine all cylinders run with no backfire. But, it acts like its running rich and has a fuel knock like improper combustion. NOT a push tube or rod. after running a few minutes either retarded or advanced the engine will die. going to go to lunch to think on it.