Car Forum / Driving, Maintenance, Tuning / Maintenance and Repair / March 2008
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cuhulin@webtv.net - 19 Mar 2008 17:53 GMT why I wont buy that 1990 Chevrolet RV van from a neighbor who lives in that house behind me is because I dont know anything about throttle body fuel injection,,,, I think I am too old to learn either.Carburetors, (simple one barell and two barrel carburetors, I know how to work on and get them going) It is a nice looking 1990 Chevrolet RV van, but not for me. cuhulin
cavedweller - 19 Mar 2008 18:44 GMT On Mar 19, 12:53 pm, cuhu...@webtv.net wrote:
> why I wont buy that 1990 Chevrolet RV van from a neighbor who lives in > that house behind me is because I dont know anything about throttle body [quoted text clipped - 3 lines] > me. > cuhulin Yeah, right. I think you said you were 61?
cuhulin@webtv.net - 19 Mar 2008 19:32 GMT I am sixty six.I am not going to learn about throttle body or otherwise fuel injection gas engines, now or ever.My 1962 four cylinder Mercedes Benz diesel engine has fuel injection.No problem for me is that MB engine. cuhulin
aarcuda69062 - 20 Mar 2008 05:07 GMT In article <deb28d30-5c8d-4a12-883b-7535eb749648@s19g2000prg.googlegroups.co m>,
> On Mar 19, 12:53 pm, cuhu...@webtv.net wrote: > > why I wont buy that 1990 Chevrolet RV van from a neighbor who lives in [quoted text clipped - 6 lines] > > Yeah, right. I think you said you were 61? Some people die long before they get anywhere near a grave.
Been meaning to e-mail you one of these days...
Runk - 19 Mar 2008 20:30 GMT Pretty much the same thing as your 62 , only with gas and a single in injector ... P.S. I'm an Old Fart to!
> why I wont buy that 1990 Chevrolet RV van from a neighbor who lives in > that house behind me is because I dont know anything about throttle body [quoted text clipped - 3 lines] > me. > cuhulin cuhulin@webtv.net - 19 Mar 2008 21:32 GMT I am old/young,,, Agewise, I date from back around November 5,1941.I am too old a dog to get screwed by a kitty. cuhulin
HLS - 19 Mar 2008 23:22 GMT > 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.
Scott Dorsey - 20 Mar 2008 03:37 GMT >> 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
 Signature "C'est un Nagra. C'est suisse, et tres, tres precis."
aarcuda69062 - 20 Mar 2008 04:46 GMT > I've synchronized dual downdraft carbs. FI systems scare me sure, but > not as much as anything made by Solex. > --scott How about synchronizing dual GM throttle body injectors like the 84 Corvette had?
Still have the slack tube manometer around here somewhere...
Mike - 20 Mar 2008 06:00 GMT >> I've synchronized dual downdraft carbs. FI systems scare me sure, but >> not as much as anything made by Solex. [quoted text clipped - 4 lines] > > Still have the slack tube manometer around here somewhere... I remember those dual throttle body Corvettes ! Not one of GM's better ideas.
z - 21 Mar 2008 21:59 GMT > >> Pretty much the same thing as your 62 , only with gas and a single in > >> injector ... P.S. I'm an Old Fart to! [quoted text clipped - 7 lines] > -- > "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.....
Steve B. - 20 Mar 2008 01:51 GMT >why I wont buy that 1990 Chevrolet RV van from a neighbor who lives in >that house behind me is because I dont know anything about throttle body [quoted text clipped - 3 lines] >me. >cuhulin If you spent as much time learning fuel injection as you did telling us that you won't buy a vehicle with fuel injection you would already be an expert.
Steve B.
Pete C. - 20 Mar 2008 03:19 GMT > >why I wont buy that 1990 Chevrolet RV van from a neighbor who lives in > >that house behind me is because I dont know anything about throttle body [quoted text clipped - 9 lines] > > Steve B. I think FI is simpler than a carb. It's just a solenoid valve, power it to spray fuel.
HLS - 20 Mar 2008 14:19 GMT "Pete C." <aux3.DOH.4@snet.net> 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.
Once the car is started, the ECM takes over the function of the fuel injection system controlled by operating parameters.
Not much is available, AFAIK, about the nature of that startup waveform, in case a person would like to bypass the security system totally. (The electronics in these cars is excessive and subject to multiple types of glitches)
Does anyone know if that waveform is a simple set of pulses, or is it more complicated?
Pete C. - 20 Mar 2008 15:20 GMT > "Pete C." <aux3.DOH.4@snet.net> wrote in message news:YQjEj.5554 > > [quoted text clipped - 20 lines] > Does anyone know if that waveform is a simple set of pulses, or is it more > complicated? I would expect it's just pulses as I don't know of any reason you'd want to send anything but a basic PWM waveform to a fuel injector. If you have a sample vehicle and a scope with storage capability you should be able to identify it pretty readily. Since you're talking a low bandwidth signal, there are pen style USB digital storage scopes you can use with a laptop that are quite inexpensive.
Scott Dorsey - 20 Mar 2008 15:51 GMT >> Not much is available, AFAIK, about the nature of that startup waveform, in >> case a person would like to bypass the security system totally. (The [quoted text clipped - 10 lines] >signal, there are pen style USB digital storage scopes you can use with >a laptop that are quite inexpensive. Ask your local auto thief. As soon as car manufacturers come out with a new security system, the guys stealing cars come out with a workaround within a year or so. It's a win-win situation for both of them. The only people who lose are the car owners... --scott
 Signature "C'est un Nagra. C'est suisse, et tres, tres precis."
HLS - 20 Mar 2008 16:27 GMT "Pete C." <aux3.DOH.4@snet.net> wrote in message news:NouEj.20438
>> Does anyone know if that waveform is a simple set of pulses, or is it >> more [quoted text clipped - 6 lines] > signal, there are pen style USB digital storage scopes you can use with > a laptop that are quite inexpensive. I had asked Ian over on alt.autos.gm, but his dealership literature didnt say much about it either.
This is a really nice looking little two seater, but the electrical problems that are incumbent with this sort of design sometimes outweigh the pleasures. When it is running well, it is a fine ride. Otherwise, you walk home.
aarcuda69062 - 21 Mar 2008 04:36 GMT > "Pete C." <aux3.DOH.4@snet.net> wrote in message news:YQjEj.5554 > > [quoted text clipped - 8 lines] > obstinant > at the time. The ECM doesn't generate waveforms. it merely processes inputs and toggles outputs.
> Once the car is started, the ECM takes over the function of the fuel > injection system > controlled by operating parameters. Actually, this occurs as soon as the starter motor engages and turns the crankshaft.
> Not much is available, AFAIK, about the nature of that startup waveform, in > case a person would like to bypass the security system totally. (The > electronics in these cars > is excessive and subject to multiple types of glitches) In this context, by passing the VATS system is as simple as measuring the resistance of the key pellet with an ohm meter and substituting a resistor of that value at a convenient point in the VATS harness. IOWs, the standard work around if installing a wireless remote start.
> Does anyone know if that waveform is a simple set of pulses, or is it more > complicated? The key resistance is not a waveform, it is a simple voltage drop.
I haven't studied this system in over 20 years but it is probably a situation where there is a matching resistor on whichever circuit board serves the VATS system, When the key is inserted in the ignition lock, that resistance is put in parallel with the one on the circuit board. If the voltage drop is correct, the fuel system is enabled.
HLS - 21 Mar 2008 13:33 GMT >> "Pete C." <aux3.DOH.4@snet.net> wrote in message news:YQjEj.5554 >> > [quoted text clipped - 13 lines] > The ECM doesn't generate waveforms. it merely processes inputs > and toggles outputs. **** According to the schematic I have, the system generates a series of pulses to fire the injectors during startup. Sort of jump starts the injection system. After the engine starts or engages, the FI is controlled separately. Maybe we are saying the same thing, maybe not. Havent looked at the schematic in a while. Maybe those pulses come from somewhere other than the ECM, but they are generated only if the resistance "code" is met. Otherwise, I could bypass the security system and activate the starter directly. If I try that as it sits, the car will not start because no fuel will be injected.
>> Does anyone know if that waveform is a simple set of pulses, or is it >> more >> complicated? > > The key resistance is not a waveform, it is a simple voltage drop. ****Yep, correct. The VATS is nothing more than a code reader at this level. The resistance in the key is compared with that in the VATS system, and if it is within reasonable correspondence, the system should allow the starter to engage.And if the system is functional, the FI system will inject a starting charge at this point.
> I haven't studied this system in over 20 years but it is probably > a situation where there is a matching resistor on whichever > circuit board serves the VATS system, When the key is inserted in > the ignition lock, that resistance is put in parallel with the > one on the circuit board. If the voltage drop is correct, the > fuel system is enabled. ***This is a resistance comparator situation, as you suggest. I already bypassed the resistor in the key with a precision resistor, and this worked well for a while. Then it stopped working. I havent gone back in to see what is wrong with it, but it is probably just a simple connection problem.
This car has been plagued by another problem, intermittent battery discharge. Hard as hell to find in a normal car, and this car is far from normal with the electrical system being as complicated as it it. I put a battery cable switch on it, and use that to protect myself. Sometimes the battery will do fine for several days, and then suddenly will be discharged.
I think my wife may have spotted the solution. She woke up in the middle of the night and saw the taillights come on. I suspect this is the long sought intermittent.
I have just about lost interest in this car due to the problems. Not one of Buick's finest moments in engineering and construction, the car is still sharp looking and fun to drive, not so fun to push.
Maybe Ill just part it out.
AZ Nomad - 21 Mar 2008 15:56 GMT >> "Pete C." <aux3.DOH.4@snet.net> wrote in message news:YQjEj.5554 >> > [quoted text clipped - 8 lines] >> 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?
aarcuda69062 - 21 Mar 2008 17:29 GMT In article <slrnfu7j4u.jb8.aznomad.3@ip70-176-155-130.ph.ph.cox.net>,
> >> "Pete C." <aux3.DOH.4@snet.net> wrote in message news:YQjEj.5554 > >> > [quoted text clipped - 16 lines] > Where did you get that insane notion? Do you even know what a waveform > is? You believe that the ECM generates waveforms?
Wave forms are an observed phenomena, the shape of which are influenced by inductance, reactance, resistance, reluctance, etc.
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. Explain for me how this is the result of anything having to do with the ECM.
The ECM no more "generates" waveforms then the newspaper generates news.
HLS - 21 Mar 2008 17:37 GMT > In article > <slrnfu7j4u.jb8.aznomad.3@ip70-176-155-130.ph.ph.cox.net>, [quoted text clipped - 36 lines] > The ECM no more "generates" waveforms then the newspaper > generates news. The waveform I was referring to is a simple square wave, switching situation for the injectors during startup.
AZ Nomad - 21 Mar 2008 17:58 GMT >In article ><slrnfu7j4u.jb8.aznomad.3@ip70-176-155-130.ph.ph.cox.net>,
>> >> "Pete C." <aux3.DOH.4@snet.net> wrote in message news:YQjEj.5554 >> >> > [quoted text clipped - 16 lines] >> Where did you get that insane notion? Do you even know what a waveform >> is?
>You believe that the ECM generates waveforms?
>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.
>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 sh.t sherlock. It is one reason you use an osciloscope instead of a voltmeter.
Comboverfish - 21 Mar 2008 20:06 GMT > >> >The ECM doesn't generate waveforms. it merely processes inputs > >> >and toggles outputs. [quoted text clipped - 14 lines] > > No sh.t sherlock. It is one reason you use an osciloscope instead of a voltmeter.- Hide quoted text - For all other reasons, I just use an *oscilloscope*, Watson... y'know, to see waveform(s) on the screen that represent voltage activity on the tested circuit(s).
Toyota MDT in MO
aarcuda69062 - 22 Mar 2008 00:49 GMT > >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 [quoted text clipped - 3 lines] > No sh.t 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?
AZ Nomad - 22 Mar 2008 01:23 GMT >> >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>
Mike - 21 Mar 2008 19:18 GMT >>> "Pete C." <aux3.DOH.4@snet.net> wrote in message news:YQjEj.5554 >>> > [quoted text clipped - 16 lines] > 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 !!!!
HLS - 21 Mar 2008 21:32 GMT >>>> "Pete C." <aux3.DOH.4@snet.net> wrote in message news:YQjEj.5554 >>>> > [quoted text clipped - 21 lines] > 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.
Pete C. - 21 Mar 2008 22:27 GMT > >>> "Pete C." <aux3.DOH.4@snet.net> wrote in message news:YQjEj.5554 > >>> > [quoted text clipped - 19 lines] > 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.
AZ Nomad - 21 Mar 2008 23:45 GMT >>>> "Pete C." <aux3.DOH.4@snet.net> wrote in message news:YQjEj.5554 >>>> > [quoted text clipped - 16 lines] >> 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.
Comboverfish - 22 Mar 2008 00:40 GMT > >>>In article <8vtEj.21281$Ej5.12...@newssvr29.news.prodigy.net>, > [quoted text clipped - 25 lines] > > - 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
HLS - 22 Mar 2008 01:56 GMT "Comboverfish" <comboverfish@yahoo.com> 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..
AZ Nomad - 22 Mar 2008 03:19 GMT >"Comboverfish" <comboverfish@yahoo.com> 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.
aarcuda69062 - 22 Mar 2008 05:24 GMT > >"Comboverfish" <comboverfish@yahoo.com> wrote in message news:50e1a360-a76c- > >> So again, the scope generates the waveform. [quoted text clipped - 5 lines] > 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.
AZ Nomad - 22 Mar 2008 14:31 GMT >> >"Comboverfish" <comboverfish@yahoo.com> wrote in message news:50e1a360-a76c- >> >> So again, the scope generates the waveform. [quoted text clipped - 5 lines] >> 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. You're absolutely insane.
HLS - 22 Mar 2008 14:38 GMT "AZ Nomad" <aznomad.3@PremoveOBthisOX.COM> wrote in message
> You're absolutely insane. Sorry I even asked. Too many people get hung up on the semantics, but I suspect (1) everyone knows what Im talking about, or (2) some have no clue about this system.
Let's drop the waveform word. I wanted to know how to fool the system into injecting fuel during startup if the security system was balky.
Apparently nobody knows.
aarcuda69062 - 22 Mar 2008 18:44 GMT > "AZ Nomad" <aznomad.3@PremoveOBthisOX.COM> wrote in message > > You're absolutely insane. [quoted text clipped - 7 lines] > > Apparently nobody knows. When the security system is acting up, does the starter work?
cuhulin@webtv.net - 22 Mar 2008 19:12 GMT I looked on the web for, Troubleshooting 1990 Chevrolet van 350 fuel system
One of the sites there said something about a noid light.So then I looked up, Noid Light
It's all Greek to me. cuhulin
cavedweller - 22 Mar 2008 19:49 GMT On Mar 22, 1:12 pm, cuhu...@webtv.net wrote:
> I looked on the web for, Troubleshooting 1990 Chevrolet van 350 fuel > system [quoted text clipped - 4 lines] > It's all Greek to me. > cuhulin Of course.
aarcuda69062 - 22 Mar 2008 22:16 GMT > I looked on the web for, Troubleshooting 1990 Chevrolet van 350 fuel > system [quoted text clipped - 4 lines] > It's all Greek to me. > cuhulin Actually, "noid" is latin.
cavedweller - 22 Mar 2008 23:16 GMT > In article <1153-47E54C1C-1...@storefull-3256.bay.webtv.net>, > [quoted text clipped - 9 lines] > > Actually, "noid" is latin. Same deal as "blog". ;)
HLS - 23 Mar 2008 01:39 GMT >I looked on the web for, Troubleshooting 1990 Chevrolet van 350 fuel > system [quoted text clipped - 4 lines] > It's all Greek to me. > cuhulin HLS - 23 Mar 2008 01:40 GMT >I looked on the web for, Troubleshooting 1990 Chevrolet van 350 fuel > system [quoted text clipped - 4 lines] > It's all Greek to me. > cuhulin Greek culture has nothing to do with fuel injection.
HLS - 23 Mar 2008 01:39 GMT >> "AZ Nomad" <aznomad.3@PremoveOBthisOX.COM> wrote in message >> > You're absolutely insane. [quoted text clipped - 9 lines] > > When the security system is acting up, does the starter work? Absolutely NOT. It could be routed past the security system, but the lack of injector function would still not let the car start.
To totally bypass this GM abortion would require direct connection to the starter, AND activation of the injectors outside the normal startup cycle.
aarcuda69062 - 23 Mar 2008 03:42 GMT > >> "AZ Nomad" <aznomad.3@PremoveOBthisOX.COM> wrote in message > >> > You're absolutely insane. [quoted text clipped - 15 lines] > To totally bypass this GM abortion would require direct connection to the > starter, AND activation of the injectors outside the normal startup cycle. I think one work around would be to have a new custom PROM burned that ignores the VATS function.
HLS - 23 Mar 2008 01:49 GMT >> "AZ Nomad" <aznomad.3@PremoveOBthisOX.COM> wrote in message >> > You're absolutely insane. [quoted text clipped - 9 lines] > > When the security system is acting up, does the starter work? Where are you? Do you want to fix this POS for me? If I knew any experts here who would take this car and return me a ride, I would be most happy.
aarcuda69062 - 23 Mar 2008 03:40 GMT > >> "AZ Nomad" <aznomad.3@PremoveOBthisOX.COM> wrote in message > >> > You're absolutely insane. [quoted text clipped - 11 lines] > > Where are you? Right here. 20 or so miles north of Milwaukee, about two miles east of the big pond.
> Do you want to fix this POS for me > If I knew any experts here who would take this car and return me a ride, > I would be most happy. You said that you installed a bypass resistor. Where and how exactly did you install it?
Does it set codes when it no starts?
HLS - 23 Mar 2008 15:18 GMT "aarcuda69062" <nonelson@sbcglobal.net> wrote in message news:nonelson-
> You said that you installed a bypass resistor. Where and how exactly > did you install it? Wires going to the contacts in the ignition switch were removed and the equivalent key resistance (dont remember just which resistor value just now) was soldered into place. Taped and put back out of the way.
> Does it set codes when it no starts? As best I remember, no. It has set phantom codes on occasions but they apparently have no bearing on anything. As I remember it, they come from the leveling system.
The Check Engine light is on, due to the cam magnet having taken a dive. That never causes any real problems either. I have a block prepped, and all the new parts to put in a fresh engine, but have not wanted to get involved with this due to the electrical problems.
This series of car is KNOWN for electrical problems.
aarcuda69062 - 23 Mar 2008 16:17 GMT > "aarcuda69062" <nonelson@sbcglobal.net> wrote in message news:nonelson- > [quoted text clipped - 6 lines] > soldered > into place. Taped and put back out of the way. I think it would be worthwhile to move the resistor to as close to the VATS module as possible.
> > Does it set codes when it no starts? > > As best I remember, no. It has set phantom codes on occasions > but they apparently have no bearing on anything. As I remember it, they come > from the leveling system. It should code if the VATs prevented a start. It's entirely possible the problem lies elsewhere like the starter inhibit relay.
> The Check Engine light is on, due to the cam magnet having taken a dive. > That never causes any real problems either. I have a block prepped, and all > the > new parts to put in a fresh engine, but have not wanted to get involved with > this > due to the electrical problems. I don't blame you.
> This series of car is KNOWN for electrical problems. I know. The manager at the local NAPA had one. Thank god he finally totaled it. The electrical systems are akin to what's found on aftermarket customized vans.
aarcuda69062 - 22 Mar 2008 14:46 GMT > >> >"Comboverfish" <comboverfish@yahoo.com> wrote in message > >> >news:50e1a360-a76c- [quoted text clipped - 11 lines] > > You're absolutely insane. I doubt that you're qualified to make that determination.
BTW, didn't you <plonk> me?
Comboverfish - 23 Mar 2008 15:14 GMT > >"Comboverfish" <comboverf...@yahoo.com> wrote in message news:50e1a360-a76c- > >> So again, the scope generates the waveform. [quoted text clipped - 3 lines] > > By fish's logic, there's no such thing as a electrical waveform. Explain the rationale which led you to this conclusion. When seeing that I posted agreed upon definitions for [electrical] waveform, how would one come to the conclusion that I'm a disbeliever in "electrical waveforms"?
> The best thing to do with the fool is put him into a killfile. That's clearly the best policy, just like you have proven to do in the past.
Toyota MDT in MO
Comboverfish - 23 Mar 2008 15:06 GMT > "Comboverfish" <comboverf...@yahoo.com> 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.. This is all rather trivial and semantic-y, but it does appear that you are ignoring the definition(s) of waveform. Whatever. It certainly doesn't matter in the end; like someone else typed, we all understand the crux of the biscuit.
Toyota MDT in MO
AZ Nomad - 22 Mar 2008 15:23 GMT >"Pete C." <aux3.DOH.4@snet.net> 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 [quoted text clipped - 3 lines] >obstinant >at the time.
>Once the car is started, the ECM takes over the function of the fuel >injection system >controlled by operating parameters. Dropping the "waveform" discussion....
The ECU controls the injectors totally. It generates the signal to each injector. It turns on the injector at the right time in the firing sequence, and back off after the correct amount of fuel has flowed, once per rotation of the engine.
If the ECU's other logic has decided that there is a break-in in process, there is no way the engine can run. The ECU doesn't send a yes/no to some other system to run the injectors. It literally operates the injectors, intimately, and in real time.
The ECU may also have the logic for querying the key. The only real way to fix a bad reader is to replace it. Get one from a junk yard if don't feel like paying the dealer's 1,000% markup.
HLS - 23 Mar 2008 01:46 GMT "AZ Nomad" <aznomad.3@PremoveOBthisOX.COM> wrote in message
> The ECU may also have the logic for querying the key. The only real way > to > fix a bad reader is to replace it. Get one from a junk yard if don't feel > like paying the dealer's 1,000% markup. It may be the best way, but certainly is not the only way, nor the cheapest way.
You can shunt the key reader with an equivalent resistance, as was mentioned earlier. (Now, anyone who challenges the term "shunt" is a cocksucker.. You know what I am saying..)
There are two issues in this system.. If the FGM system doesnt work, then the starter can be approached directly, AND the injectors can be fired independently of the freaking security system..
Then it should start, and having started should run.
There is a special place in Hell, next to the furnace, for GM engineers.
* - 20 Mar 2008 17:09 GMT cuhulin@webtv.net wrote in article <414-47E14518-848@storefull-3253.bay.webtv.net>...
> why I wont buy that 1990 Chevrolet RV van from a neighbor who lives in > that house behind me is because I dont know anything about throttle body [quoted text clipped - 3 lines] > me. > cuhulin Geez!
You say that as though you truly believe that there are more than a couple of people - if that - in this world whose lives simply will not go on without your daily ramblings!
AZ Nomad - 20 Mar 2008 17:48 GMT >cuhulin@webtv.net wrote in article ><414-47E14518-848@storefull-3253.bay.webtv.net>... [quoted text clipped - 5 lines] >> me. >> cuhulin
>Geez!
>You say that as though you truly believe that there are more than a couple >of people - if that - in this world whose lives simply will not go on >without your daily ramblings! Ditto for your bitching. Originally, I never saw his rambling because I filter out all webtv posts. Thanks for reposting his ramblings along with your amazing insights. not.
Lhead - 20 Mar 2008 18:24 GMT > >cuhu...@webtv.net wrote in article > ><414-47E14518-...@storefull-3253.bay.webtv.net>... [quoted text clipped - 16 lines] > > - Show quoted text - The OP here is probably one of those old guys with nothing but time on his hands and maybe he's lonely and this is the way he communicates. I don't know. If you look frequently at the group, you'll notice he chimes in often with stories and anecdotes that have little if anything to do with the topic being discussed.
I've heard that there are none so ignorant as they who will not learn. This seems to apply to this fella. Modern FI is not more complicated than carbs - far from it - especially TBI. Trying working on a late '70's Fomoco variable venturi carb. I wouldn't wish that on my worst enemy.
I'm glad I learned how to set dwell on a set of points, adjust float levels and mixture controls, etc. But I wouldn't want to go back there.
cuhulin@webtv.net - 20 Mar 2008 21:30 GMT I am sort of looking around for a 1957 Ford 500 2 door hard top car in decent condition at a cheap enough price to suit me, a car like that I can work on and around with.I prefer one that is black with the gold trim looking thingys on it.No rust buckets, I tote my little pocket mgnet with me everywhere. cuhulin
wstiefer - 20 Mar 2008 21:53 GMT > I am sort of looking around for a 1957 Ford 500 2 door hard top car in > decent condition at a cheap enough price to suit me, a car like that I > can work on and around with.I prefer one that is black with the gold > trim looking thingys on it.No rust buckets, I tote my little pocket > mgnet with me everywhere. > cuhulin Current bid: US $7,358.00 Reserve not met
price: US $13,500.00 Get low monthly payments
* - 21 Mar 2008 14:56 GMT AZ Nomad <aznomad.3@PremoveOBthisOX.COM> wrote in article <slrnfu55as.nbh.aznomad.3@ip70-176-155-130.ph.ph.cox.net>...
> >cuhulin@webtv.net wrote in article > ><414-47E14518-848@storefull-3253.bay.webtv.net>... [quoted text clipped - 15 lines] > filter out all webtv posts. Thanks for reposting his ramblings along with your > amazing insights. not. Glad I could be helpful to you.
You might have missed the old guy's post otherwise.
Paul - 20 Mar 2008 23:57 GMT > why I wont buy that 1990 Chevrolet RV van from a neighbor who lives in > that house behind me is because I dont know anything about throttle body [quoted text clipped - 3 lines] > me. > cuhulin I am about your age and I will never stop trying to learn new things.
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