miked

I actually had it right with 2 piston configuration injecting 1/2 cycle and direct spark. Only issue is it only starts 50% of the time as with no cam sync it doesnt know which phase its in. But it doesnt bother me.

Hi Stewart! I have it sorted and running now. I ended up scoping the stock ecu and finding a configuration that was close and worked from there. Fired right up. Thanks for your idea though.

Ok, Ill keep trying. Would it be worth upgrading to the g4 firmware? As in would it make all this easier?

Ok, looks like ill have to add a cam sync. What position in the cam rotation would recommend? Or does it not matter? It is a single cam 2v Thanks again for your help.

Here is one with Direct Spark ignition configuration

Here are a few captures with different configurations. BLUE - Crank sensor GREEN - Injector drive 1 RED - Coil signal Waveform1 Configuration: Piston, 2 cyl, Firing 1,2 Trigger: Multitooth/Missing 12-1 Injection: Multipoint/GroupIgnition: Distributor Waveform 2 Same as one but 1/2 engine cycle Waveform 3 Same as one but 2 stroke, 1 engine cycle Fuel and ignition tables have not been looked at. Ignition is locked at 0 degrees. Sorry, just realised there is no identifying each waveform. FUEL AND IGNITION

I would have thought so to. Ignition is set to direct spark and fires at the right time every 720⁰ consistently it will start and run on brake clean no trouble. Im going to try setting spark to distributor and check each injector output to see if one of the others I am not currently using is pulsing at the correct time. Thank you for your assistance.

This is correct. However I have it to a point where ignition is firing at/slightly before tdc every compression cycle. If it knows when ignition is required, shouldnt it also know when to inject based on the engine configuration? Is there no way to achieve injection on the intake without a sync pulse of some kind?

Im using an oscilliscope to record crank signal, ignition, and injection at the same time. Using the multi/missing tooth 12-1 with no sync, crank only.

Hi team! Ive install an old LEM G3 into my single cylinder tu250cc for a laugh. This is my first jump into aftermarket ecus. I am having trouble getting it to inject at the right time. Got ignition nailed at 0⁰ for reference and solid signals all round but for some reason I cant get injection on the right cycle. I have tried all sorts of configurations but no luck. I am probably missing something here but I cant see it. Currently configured to 2 piston (cant select 1) Any ideas would be greatly appreciate.