working on a 90 vnt daytona, new spark plugs and getting spark, changed number 3 injector and checked to see if it was spraying fuel and it was. changed the distributor cap and hep. basically all electrical except the harness for fuel rail but didnt see need for that because all wires looked good and was shooting fuel. pulled valve cover and seems that head is working fine (valves, rockers, etc.) compression tested 120 across the board. took off #2 and 4 spark plug wires while running and car dies but when #3 was removed nothing changed. checked timing time and time again and also went through the vac lines replacing all damaged. any and all ideas welcome.