grisom Posted December 26, 2019 Report Share Posted December 26, 2019 Greetings! Have found some trouble with starting Ls3 engine on a Xtreme model. After wiring all coils and injectors to corresponding drives on an ECU, found that Trigger 2 is not working due to bigger custom front cover where sync sensor is located. So I decided to start engine without sync signal. Injectors chose an option "multi point group", and ignition "direct spark". Help file says that that in a "direct spark" (8 cyl) there will be active only 1-4 ignition drives. When I crank engine, drives 5-8 where sending pulses as well to coils. But engine don't won't to operate correctly. Is there an option to make all ignition drives work in a wasted spark way? Quote Link to comment Share on other sites More sharing options...
Fotis Posted December 26, 2019 Report Share Posted December 26, 2019 In order to start with trig1 (crank sensor) you will have to wire you ignition coils as wasted spark and set it to wasted spark instead of direct spark. Have you changed the settings for cylinder numbers and firing orders? Quote Link to comment Share on other sites More sharing options...
grisom Posted December 26, 2019 Author Report Share Posted December 26, 2019 It is mil spec wired. So It is hard to rewire. Initially it was wired for sequential injection and ignition. I just want to know, If each ignition drive wired to its own coil - can it work in wasted spark way? For example ignition drive 1and 5 trigger simultaneous. Quote Link to comment Share on other sites More sharing options...
Adamw Posted December 26, 2019 Report Share Posted December 26, 2019 No, the coils have to be wired in pairs for wasted spark. the only other work around you could use is change the trigger mode to multitooth missing and set trigger 2 sync mode to none. It will then still run fully sequential and direct spark without the cam sensor but it will only start approx 50% of start attempts. If it doesn’t fire instantly you need to stop cranking and try again. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.