Hi i am new to the list and i have a cpl of ??'s

David Hunt bamainc at home.com
Mon Jul 30 17:38:41 GMT 2001


How useful would such a circuit be?  Would an LED readout be adequate?

dh


----- Original Message -----
From: "Matt Cramer" <mac9 at po.cwru.edu>
To: <diy_efi at diy-efi.org>
Sent: Monday, July 30, 2001 9:07 AM
Subject: Re: Hi i am new to the list and i have a cpl of ??'s


> At 04:33 PM 7/28/2001 -0500, you wrote:
> >I have an EFI toyota supra 87 model and i was wondering how could i
measure
> >the injector duty and make my own little gauge for it??
> >
> >And about how many people are on this list??
> >
> >Brett Downs
> >
> Well, I'm somewhat new to EFI myself, so you more experienced guys,
> correct me if I'm wrong here.  The easiest way I can think of to measure
> duty cycle would be to hook an oscillosope up to one of your injectors.
> The duty cycle is the fraction of the time where the injectors are
> recieving power.
> Or if you want a device that measures duty cycle alone, rig up a circuit
> that averages the voltage supplied to the injector over time.  The duty
> cycle should be about equal to that average divided by the peak voltage.
> I'm not sure precisely how I would build a gauge to do this, though.
>
> Matt Cramer
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