Well its been a long time between drinks, i've learnt a lot since i tried to run the 202 on jackaroo DFI and 6 + 1 crank trigger feeding into LS 0411 PCM....
So i have had it running previously but it never really ran well and it was pushed into the corner after that for other priorities, so i wanted to try and work a few things out to see where my issues might have been.
1. did i have the injectors on the right cylinder, and being it was an 8 cylinder loom, did i have an injector connected that wasnt firing at all in 6 cylinder low res mode etc.
2. was the signal outputted from the DFI module to the ECU (3 x per revolution) acceptable being that it was not the usual 60 degree on 60 degree off signal the standard v6 trigger creates.
3. was the EST signal outputting the right amount of pulses to fire the coil on every cylinder.
so in my case with the jackaroo DFI, it takes a 6 + 1 trigger, and then from that it fires the pairs of coils in a set pattern, so its easy enough to put the right plug leads on the right coils to get the firing order and wasted spark pairs sorted out.
It then sends a signal to the ECU which is a 3 pulses per revolution signal, which the ECU then picks up as its RPM pulse, and from there it sends back a EST signal, when to fire, how long etc (the spark control basically).
so i knew the DFI module was ok as i scoped its input and outputs, so i decided a good way to test was to get an ECU on the bench, wire in what i needed to see all the injectors and crank/cam etc signals, i then programmed up an arduino to make a 60 degree on/off signal, and after every 360 degrees change the cam from high/low etc ...
as you can see below, the crank signal is a perfect on/off every 60 degrees, and that was showing around 750rpm in HPT - just for reference.
I actually did the below log first as i wanted to confirm i was getting a crank signal before i worried about the cam .... i found it quite interesting that above with the cam connected i was only getting 2 injectors firing and they were halfway between each cam transition.
So as you can see below, without the cam signal i get all 6 injectors firing, and they are in the correct firing order for my 202 (when i wired it up i used the v6 firing order compared to the 202 and put the injectors in the right order to suit) - so seems i got that part right, and the two injectors not used are not ones i should have used so happy days.
So this next one is basically the same as above but i used a 4mS trigger signal and then 24mS gaps between, again around 750rpm on HPT and cam signal not connected, when it was i had the same as the first picture.
so i am stoked that i have at least confirmed a few things are right, and that the signal from the DFI module should work fine for the 0411 pcm.
BUT.... i am very confused as to why when it has a cam signal it seems to not work properly.
i am also going to assume, while its firing the injectors in the order i want, it has no way of knowing when to fire which injector, i dare say it just takes the first rpm signal as the start of the firing order and goes from there, so it could literally be half the motor out in the firing order!
now the tune i am using is basically a stock tune with vats removed and made sure the low res option was selected oh and injector rate to suit.