[Gmecm] Port injector wiring

[Robin Handley]

Looking back in my list archive, given that the 1227730 and 1227727 have
identical internals (I believe) then both have 2 wires but are driven from
the same driver.

So, my next electronics novice question is: Will I upset anything if I just
connect all my 4 high impedance Bosch injectors to one line?

Robin

----- Original Message -----
From: "Robin Handley" <Robin at FuryWorld.fsnet.co.uk>
To: <gmecm at diy-efi.org>
Sent: 26 April 2006 00:37
Subject: [Gmecm] Port injector wiring


> It's been quite a while since I posted, so apologies if this is a really
> dumb question to return with:
>
> I've been using ANHT in a 1227727 to control the ignition on my 4 cylinder
> engine for a couple of years now. I'm using a reluctor trigger in a
> distributor to provide the trigger inputs via an 8 pin HEI.
>
> I'm now starting to think about fuel injection, with one injector per
port.
> Using my distributor trigger, the ECM doesn't know which cylinder is
> triggering at any time, but this isn't a problem for ignition as the rotor
> arm sorts it out. But what happens with injection? I can only think that
all
> the injectors must fire at every trigger event - 'batch' injection. The
> on-line wiring diagrams for the 1227727 show one injector pin for
cylinders
> 2, 4, 6, 8 and another for 1, 3, 5, 7. As ANHT is intended for an 8
cylinder
> engine this suggests that more information is available to the ECM than my
> distributor trigger can provide. Is this right - I can't see another
sensor
> in the wiring diagrams? Could somebody please explain to me when these two
> banks are fired, and how I should wire these pins up to my (only) 4 port
> injectors, given that I'm using a distributor trigger?
>
> Robin