I have a 351W in my MK1 with a Speed Pro ECU for the fuel Injection system. The engine when running sounds great, the right side that is, the left side isn’t getting any fuel at all. I checked and the circuit isn’t closing on the left 4 cylinders for the injectors to fire. Spark is good, on all 8 cylinders. The four cylinders firing sound great and are running well. I’m at a lost as to what might be the problem... or even better what the solution should be. Any advice out there? I welcome your experiences. Thanks