Injector impedance

[Marteney, Steven J.]

Well, my apologies, but I initially dismissed this response.  Well, I was
looking at my 89 wiring diagram (a jpg from the website) and noticed the
picture cuts off the other side of the injector connection.  For some stupid
reason, I had it in my head that they all tied to ground and a high side
driver drives them to +12V.  Where'd I get that?  So I'm guessing they all
tie to +12V and the ECM pulls them to ground?

Thanks for setting me straight.
Steve

-----Original Message-----
From: rr [mailto:RRauscher at nni.com]
Sent: Tuesday, May 01, 2001 7:21 PM
To: gmecm at diy-efi.org
Subject: Re: Injector impedance



With saturated injectors, just ground them with a mosfet or npn transistor.

BobR.

Marteney, Steven J. wrote:

> Happy to look through the archives for this info but can't find where I
> downloaded them to, so have to download them again sometime.  In the
> meantime, anyone know what the true IMPEDANCE of a TPI 22# injector is?
My
> ohmmeter says 16.2 to 16.6 ohms resistance, but I'm curious about its
> inductance.  Don't have an LCR meter here :-(
>
> I've got some extra power op-amps here collecting dust and been thinking
of
> making my own injector driver, rather than buy the cherry part.  Probably
> pointless but I'm just looking for some circuits to play with.
>
> Steve
>
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