And the Reason

"Mike" > wrote in message
...
>
> "AZ Nomad" > wrote in message
> ...
>> On Thu, 20 Mar 2008 22:36:05 -0500, aarcuda69062 >
>> wrote:
>>>In article > ,
>>> "HLS" > wrote:
>>
>>>> "Pete C." > wrote in message news:YQjEj.5554
>>>> >
>>>> > I think FI is simpler than a carb. It's just a solenoid valve, power
>>>> > it
>>>> > to spray fuel.
>>>>
>>>> Which brings up a question of mine....
>>>> On some of the GM 3800 applications (in this case a 1990 Reatta), a
>>>> waveform
>>>> is generated by the ECM to fire the injectors under starting
>>>> conditions.
>>>> This will
>>>> not happen if the quirky security system (key resistance reader) is
>>>> feeling
>>>> obstinant
>>>> at the time.
>>
>>>The ECM doesn't generate waveforms. it merely processes inputs
>>>and toggles outputs.
>>
>> Where did you get that insane notion? Do you even know what a waveform
>> is?
>
> All the ECM does is provide a ground to the fuel injector for a
> programmed period of time. It DOES NOT generate a waveform !!!!

In providing a grounding function it serves as a switch, and certainly does
provide
the switching waveform.

On Mar 19, 10:37*pm, (Scott Dorsey) wrote:
> HLS > wrote:
> >"Runk" > wrote in message
> >newsRdEj.83054$yE1.19331@attbi_s21...
> >> Pretty much the same thing as your 62 , only with gas and a single in
> >> injector ... P.S. I'm an Old Fart to!
>
> >Im 67. Im older and fartier than either of you. *But FI doesnt scare me..
> >Nothing much else does either.
>
> I've synchronized dual downdraft carbs. *FI systems scare me sure, but
> not as much as anything made by Solex.
> --scott
> --
> "C'est un Nagra. *C'est suisse, et tres, tres precis."

Ha, I laugh at your dual downdraft carbs, having spent a year driving/
working on a 7 year old Corvair with 4 carbs. Carbs weren't a problem,
but that Chevy 2 cent linkage.....

Mike wrote:
>
> "AZ Nomad" > wrote in message
> ...
> > On Thu, 20 Mar 2008 22:36:05 -0500, aarcuda69062 >
> > wrote:
> >>In article > ,
> >> "HLS" > wrote:
> >
> >>> "Pete C." > wrote in message news:YQjEj.5554
> >>> >
> >>> > I think FI is simpler than a carb. It's just a solenoid valve, power it
> >>> > to spray fuel.
> >>>
> >>> Which brings up a question of mine....
> >>> On some of the GM 3800 applications (in this case a 1990 Reatta), a
> >>> waveform
> >>> is generated by the ECM to fire the injectors under starting conditions.
> >>> This will
> >>> not happen if the quirky security system (key resistance reader) is
> >>> feeling
> >>> obstinant
> >>> at the time.
> >
> >>The ECM doesn't generate waveforms. it merely processes inputs
> >>and toggles outputs.
> >
> > Where did you get that insane notion? Do you even know what a waveform
> > is?
>
> All the ECM does is provide a ground to the fuel injector for a programmed
> period of time. It DOES NOT generate a waveform !!!!

A PWM signal *is* a waveform.

On Fri, 21 Mar 2008 18:18:26 GMT, Mike > wrote:

>"AZ Nomad" > wrote in message
...
>> On Thu, 20 Mar 2008 22:36:05 -0500, aarcuda69062 >
>> wrote:
>>>In article > ,
>>> "HLS" > wrote:
>>
>>>> "Pete C." > wrote in message news:YQjEj.5554
>>>> >
>>>> > I think FI is simpler than a carb. It's just a solenoid valve, power it
>>>> > to spray fuel.
>>>>
>>>> Which brings up a question of mine....
>>>> On some of the GM 3800 applications (in this case a 1990 Reatta), a
>>>> waveform
>>>> is generated by the ECM to fire the injectors under starting conditions.
>>>> This will
>>>> not happen if the quirky security system (key resistance reader) is
>>>> feeling
>>>> obstinant
>>>> at the time.
>>
>>>The ECM doesn't generate waveforms. it merely processes inputs
>>>and toggles outputs.
>>
>> Where did you get that insane notion? Do you even know what a waveform
>> is?

> All the ECM does is provide a ground to the fuel injector for a programmed
>period of time. It DOES NOT generate a waveform !!!!

Yes it does. It generates a pulse train and controls the frequency and
pulse width. Again, you demonstrate you ignorance.

On Mar 21, 5:45 pm, AZ Nomad > wrote:
> On Fri, 21 Mar 2008 18:18:26 GMT, Mike > wrote:
> >"AZ Nomad" > wrote in message
> ...
> >> On Thu, 20 Mar 2008 22:36:05 -0500, aarcuda69062 >
> >> wrote:
> >>>In article > ,
> >>> "HLS" > wrote:
>
> >>>> "Pete C." > wrote in message news:YQjEj.5554
>
> >>>> > I think FI is simpler than a carb. It's just a solenoid valve, power it
> >>>> > to spray fuel.
>
> >>>> Which brings up a question of mine....
> >>>> On some of the GM 3800 applications (in this case a 1990 Reatta), a
> >>>> waveform
> >>>> is generated by the ECM to fire the injectors under starting conditions.
> >>>> This will
> >>>> not happen if the quirky security system (key resistance reader) is
> >>>> feeling
> >>>> obstinant
> >>>> at the time.
>
> >>>The ECM doesn't generate waveforms. it merely processes inputs
> >>>and toggles outputs.
>
> >> Where did you get that insane notion? Do you even know what a waveform
> >> is?
> > All the ECM does is provide a ground to the fuel injector for a programmed
> >period of time. It DOES NOT generate a waveform !!!!
>
> Yes it does. It generates a pulse train and controls the frequency and
> pulse width. Again, you demonstrate you ignorance. - Hide quoted text -
>
> - Show quoted text -

Ignorance is bliscilloscope.

From Answers.com/Sci-Tech Encyclopedia (a general scientific reference
to all types of waves that can be "formed")

Waveform

The pictorial representation of the form or shape of a wave, obtained
by plotting the amplitude of the wave with respect to time. There are
an infinite number of possible waveforms (see illustration). One such
waveform is the square wave, in which a quantity such as voltage
alternately assumes two discrete values during repeating periods of
time. Other waveforms of particular interest in electronics are the
sine wave and rectified sine wave, the sawtooth wave and triangular
wave, and the arbitrary wave--a recurrent waveform which takes on an
arbitrary shape over one complete cycle; this shape is then repeated
in successive cycles.

Or more simply and specifically explained for the purpose of this
discussion at InFocus:

Waveform

A display of a signal (on an oscilloscope) that shows the magnitude of
current or voltage with respect to time. For example, by displaying
the waveform of a signal on an oscilloscope, and measuring the time
between cycles, its frequency can be calculated.

So again, the scope generates the waveform.

Toyota MDT in MO

In article >,
AZ Nomad > wrote:

> >Wave forms are an observed phenomena, the shape of which are
> >influenced by inductance, reactance, resistance, reluctance, etc.
>
> All irrelevent.
> A waveform is simply a plot of amplitude over time.

That's right, and ECMs do not generate "plots."
>
>
> >Lets suppose we're analyzing amperage waveforms of the injectors
> >on HLS's Buick. He has one shorted injector and 5 properly
> >functioning injectors. The shorted injector is easily
> >identifiable when analyzing the waveform.
>
> No **** sherlock. It is one reason you use an osciloscope instead of a
> voltmeter.

That's right, I use an oscilloscope. What do you use?

Wanna wave your dick some more?

On Fri, 21 Mar 2008 18:49:21 -0500, aarcuda69062 > wrote:
>In article >,
> AZ Nomad > wrote:

>> >Wave forms are an observed phenomena, the shape of which are
>> >influenced by inductance, reactance, resistance, reluctance, etc.
>>
>> All irrelevent.
>> A waveform is simply a plot of amplitude over time.

>That's right, and ECMs do not generate "plots."
Yes they do. They set the output based on time and the result is
a waveform.

<plonk>

"Comboverfish" > wrote in message news:50e1a360-a76c-
> So again, the scope generates the waveform.
>
> Toyota MDT in MO


No, it doesnt. It makes the waveform visible to the observer..

On Fri, 21 Mar 2008 19:56:39 -0500, HLS > wrote:

>"Comboverfish" > wrote in message news:50e1a360-a76c-
>> So again, the scope generates the waveform.
>>
>> Toyota MDT in MO


>No, it doesnt. It makes the waveform visible to the observer..


By fish's logic, there's no such thing as a electrical waveform.
The best thing to do with the fool is put him into a killfile.

In article >,
AZ Nomad > wrote:

> On Fri, 21 Mar 2008 19:56:39 -0500, HLS > wrote:
>
> >"Comboverfish" > wrote in message news:50e1a360-a76c-
> >> So again, the scope generates the waveform.
> >>
> >> Toyota MDT in MO
>
>
> >No, it doesnt. It makes the waveform visible to the observer..
>
>
> By fish's logic, there's no such thing as a electrical waveform.
> The best thing to do with the fool is put him into a killfile.

By your logic, if I take the lid off of an ECM, a bunch of waveforms are
going to spill out.