I had posted a while back regarding a 1996 LT-4 plaaced in a 1975 Vette. My porblem is the Fuel Injectors wont fire. Plenty of spark and Fuel Pressure. No codes on the scanner. Low Res signal was 60.21 on the scanner. It has been suggested that the Opti Spark is bad. I have heard of the Opti Spark stopping Spark, but not fuel. Is it possible that the Opti Spark is not sending some signal to the Computer that controls fuel injector flow? I have had the Computer out twice and it is believed that the computer is not the problem. Any feedback would be greatly appreciated as this does not seem like any other Opti Spark problem I have read about.