Hi A bit of info below that could help in you situation. Semi-Sequential Injection
Semi sequential fires injectors in groups of two. It allows injection timing control and minimizes the time available for fuel to condense on the port walls. This mode requires sufficient triggering to determine engine position in the 720 degree engine cycle. In this mode, ideally injectors are wired in pairs according to the firing order with the pairs wired to the injector driver that corresponds to the lowest numbered cylinder in the pair. However, with some firing orders this is not possible. In cases where that rule is not possible the idea is to group injectors in such a way that the time for fuel to sit in the port is minimized. Select Sequential Injection Mode when using this wiring configuration. Note that unused injection drives will not be available for other use and will still be firing according to their position in the firing order. Examples: 6 Cylinder, firing order 1 5 3 6 2 4. Works nicely as per rule. Fuel sits in port for 120 degrees longer on the higher numbered cylinder in the pair than the other.Injector drive 1 is wired to injectors for cylinders 1 and 5. Injector drive 2 is wired to injectors for cylinders 2 and 4. Injector drive 3 is wired to injectors for cylinders 3 and 6. 8 Cylinder, firing order 1 8 4 3 6 5 7 2. Does not follow rule due to firing order. Pairs as per OEM Toyota 1UZFE wiring.Injector drive 1 is wired to injectors for cylinders 1 and 7. Injector drive 2 is wired to injectors for cylinders 2 and 8. Injector drive 3 is wired to injectors for cylinders 3 and 5. Injector drive 4 is wired to injectors for cylinders 4 and 6. 10 Cylinder firing order 1 10 9 4 3 6 5 8 7 2. Follows rule but note that the order of the high and low cylinder in each pair changes. eg in the 1-10 pair, cylinder 10 gets its fuel 72 degrees before deal. In the 9-4 pair, cylinder 9 gets its fuel 72 degrees after ideal.Injector drive 1 is wired to injectors for cylinders 1 and 10. Injector drive 2 is wired to injectors for cylinders 2 and 7. Injector drive 3 is wired to injectors for cylinders 3 and 6. Injector drive 4 is wired to injectors for cylinders 4 and 9. Injector drive 5 is wired to injectors for cylinders 5 and 8 Main condition is going to be the TPS dead band and the Accel clamp. If you TPS is nice and stable / clean then a lower dead band will make it more responsive. Just avoid going too fine as it could then bring on accel when its unwanted.
