[Diy_efi] Injectors Not Firing TESTER

[Clair Davis]

I'd kind of like to see a schematic for that, too.  555's and trans/FET's
are BEYOND Greek to me...

Clair


----- Original Message ----- 
From: "Charles Woock" <atomic at extendwireless.net>
To: "Rick McLeod" <dunvegan at sbcglobal.net>; <diy_efi at diy-efi.org>
Sent: Tuesday, October 10, 2006 9:02 PM
Subject: Re: [Diy_efi] Injectors Not Firing TESTER


> Do you have a schematic for this or know where it is on the web?
>
> Thanks
>
>
> ----- Original Message ----- 
> From: "Rick McLeod" <dunvegan at sbcglobal.net>
> To: <diy_efi at diy-efi.org>
> Sent: Tuesday, October 10, 2006 11:18 AM
> Subject: Re: [Diy_efi] Injectors Not Firing...
>
>
> to test, build a quick and dirty injector testor w/ a 555 and a power
> trans/FET set up to slow rate pulse and hook up to the 'jector to see if
it
> squirts when the fuel log is presureized
>
>
>
>
> ----- Original Message ----
> From: Andrew Hopton <hoptona at gmail.com>
> To: diy_efi at diy-efi.org
> Sent: Monday, October 9, 2006 10:51:38 PM
> Subject: RE: [Diy_efi] Injectors Not Firing...
>
>
> Hi,
>
> Actually, 12v at both pins of the injector is good (provided eng is not
> running) - because your multimeter is at least 1MOhm (and probably
> 10MOhm) it provides no appreciable load, so you will measure 12v at both
> sides of the injector's internal coil (there will only be a voltage drop
> across the injector coil when current is actually flowing - i.e. when
> the ECM grounds the 'cold' side of the injector.
>
> By seeing 12v at both sides of the injector coil, you have proved the
> injector is not internally open-circuit (aka 'fried')
>
> Cheers,
>
> Hoppy.
>
> -----Original Message-----
> From: diy_efi-bounces at diy-efi.org [mailto:diy_efi-bounces at diy-efi.org]
> On Behalf Of Clair Davis
> Sent: Tuesday, 10 October 2006 10:51 AM
> To: diy_efi at diy-efi.org
> Subject: Re: [Diy_efi] Injectors Not Firing...
>
>
> Update...
>
> OK, the multimeter says I've got 12V at BOTH pins on the injector...  Me
> thinks that's not so good, and probably not what VATS does.
>
> I also pulled the PROM out, mostly to verify to myself that I DID in
> fact have it in the box, and judging by the scribbles on the chip, the
> guy who programmed it probably DID do the right thing(s) with it.  I'll
> shoot him an email and see what he can dig up on the project.
>
> In the mean time, I've got to do some digging myself and see what I've
> done when hooking the system up.  There's NOT a separate wire for the
> injector power, so I'm thinking it is worked in to some other junction
> in the system. Time to go take some notes.
>
> Clair
>
>
> ----- Original Message ----- 
> From: "Marty Schmid" <marty67357 at yahoo.com>
> To: "Charles Woock" <atomic at extendwireless.net>; <diy_efi at diy-efi.org>
> Sent: Sunday, October 08, 2006 11:38 PM
> Subject: Re: [Diy_efi] Injectors Not Firing...
>
>
> > what prom are you using if it is camaro, moat likely vats has
> > dis-abled
> the injectors. you need to have a scan tool connected and look at the
> vats, is it enabled or disabled
> >
> > ---------------------------------
> > Talk is cheap. Use Yahoo! Messenger to make PC-to-Phone calls.  Great
> rates starting at 1?/min.
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