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Injection system

Tech Talk for Ford, Mazda, Daihatsu & Makes that currently dont have a home.

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Posts: 16
Joined: Sun Apr 20, 2008 4:38 pm
Location: Cessnock

Injection system

Post by stagma »

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.

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Post by murcod »

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! :lol:
David
Posts: 16
Joined: Sun Apr 20, 2008 4:38 pm
Location: Cessnock

Post by stagma »

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 :?
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Location: Adelaide

Post by murcod »

You sure about the Magna? I don't think sequential was even around back then. :?
David
Posts: 16
Joined: Sun Apr 20, 2008 4:38 pm
Location: Cessnock

Post by stagma »

Very sure murcod, proof below for any non-belivers

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Post by murcod »

:lol: Pity about the rest of the Magna!
David
Posts: 16
Joined: Sun Apr 20, 2008 4:38 pm
Location: Cessnock

Post by stagma »

I can only agree with you there :lol:
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Post by MightyMouse »

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.
( usual disclaimers )

It seemed like a much better idea when I started it than it does now.
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