Outer Limits 4x4 Board

Hey all,

I was doing a bit of study into the wiring diagrams for the feroza and something doesn't seem right, I can't work out how the ecu can tell what injector it has to fire. From the look of it i gets a signal from the dizzy but that only tells it when a cyl is firing a spark but not which one is firing.

And by the look of the wiring diagam i have attached it seems to me like it fires all inject every pulse from the dizzy as it seems the injectors arn't wired individually from ecu.

So if my assumptions are correct, this seems like a big waste of fuel.

That's how most old EFI systems work.

Ever heard the term "sequential injection" thrown around over the last couple of years? Well that is the new system that does individually fire each injector.

PS: The Feroza doesn't even have ECU controlled ignition timing.... pull your distributor apart and be amazed at weights, springs and vacuum chambers!

yeah i knew that about the dizzy, but from the work i have done on old magna's tn/tp 1986-1991 they ran sequential injection, and being a magna i thought most would have been ahead of them at the time... I thinks i might be wrong

You sure about the Magna? I don't think sequential was even around back then.

Very sure murcod, proof below for any non-belivers

Pity about the rest of the Magna!

I can only agree with you there

Yep Feroza is banked injection.... actually many "sequential" shift to banked at higher RPM anyway... simply to get the fuel flow window large enough.

Its actually not too bad under most situations.