New member with lots of questions... (fwd)
Tom Barcia
tbarcia at emanon.net
Wed Oct 27 13:53:49 GMT 1999
Unfortunately, I don't know. I don't want to take it to a shop because I
don't have the diag connector in the truck yet and nobody really wants to
mess with it. I may end up buying a scanner or software unless I can get
Dave's scanner to work.
Tom Barcia
tbarcia at emanon.net
www.emanon.net/~tbarcia
+----------------------+
On Wed, 27 Oct 1999, Mike Rolica wrote:
> What code is it setting?
>
> Mike Rolica
> EXT. 260
> :-)
>
>
> -----Original Message-----
> From: Tom Barcia [SMTP:tbarcia at emanon.net]
> Sent: Wednesday, October 27, 1999 8:25 AM
> To: 'gmecm at efi332.eng.ohio-state.edu'
> Subject: RE: New member with lots of questions... (fwd)
>
> Gotchya. I still have to figure out why I'm getting the MIL at part
> throttle at highway speeds. Hopefully, Dave's scanner will work and
> I'll
> be able to find the source.
>
> Thanks.
>
> Tom Barcia
> tbarcia at emanon.net
> www.emanon.net/~tbarcia
> +----------------------+
>
> On Wed, 27 Oct 1999, Mike Rolica wrote:
>
> > No just will idle funny if iac does not reset yes it will cause
> poor economy
> > (vss)
> > No I just meant that cannot use my idea of pulling prom, dumping
> it editing
> > it and burning it like normal eprom.
> >
> > If it is flash, you will have to????? There are a few guys here
> that are
> > working with flash type. Check archives
> > Mike Rolica
> > EXT. 260
> > :-)
> >
> >
> > -----Original Message-----
> > From: Tom Barcia [SMTP:tbarcia at emanon.net]
> > Sent: Wednesday, October 27, 1999 7:40 AM
> > To: 'gmecm at efi332.eng.ohio-state.edu'
> > Subject: RE: New member with lots of questions...
> (fwd)
> >
> > So, if I understand this, once I get the VSS working my IAC
> will
> > work
> > properly. I would assume that the IAC not resetting could
> cause the
> > lean
> > condition that in turn causes the MIL and the poor economy??
> That's
> > my
> > guess anyhow.
> >
> > As far as reprogramming, did you say to scrap the idea of
> flashing
> > the
> > prom?? PINE screwed up the message formatting and made it
> tough to
> > read.
> >
> > Thanks.
> >
> > Tom Barcia
> > tbarcia at emanon.net
> > www.emanon.net/~tbarcia
> > +----------------------+
> >
> > On Wed, 27 Oct 1999, Mike Rolica wrote:
> >
> > >
> > > Mike Rolica
> > > EXT. 260
> > > :-)
> > >
> > >
> > > -----Original Message-----
> > > From: T. Barcia [SMTP:tbarcia at home.com]
> > > Sent: Tuesday, October 26, 1999 9:26 PM
> > > To: gmecm at efi332.eng.ohio-state.edu
> > > Subject: FW: New member with lots of
> questions...
> > (fwd)
> > >
> > >
> > > Hello all. I'm a new member of this list and
> decided to
> > subscribe
> > > after
> > > reading some of the archives and coming up with many
> > questions. As
> > > an
> > > introduction, I'm a Network Administrator for a
> large
> > aerospace
> > > company
> > > and one of my hobbies involves swapping a 1995 3.4L
> v6 from
> > a Camaro
> > > including all of the FI goodies into a 1984 GMC
> Jimmy 4x4.
> > I'm a
> > > tinkerer
> > > by nature and love to get my hands on things that I
> know
> > nothing
> > > about.
> > > That's basically why I'm here. I admit to knowing
> very
> > little about
> > > fuel
> > > injection systems besides the very basics and
> knowing
> > nothing of the
> > > inner
> > > workings of the ECM. Given the proper ECM and
> wiring
> > harness I was
> > > able
> > > to make the 3.4 work in a non-computer equipped
> truck and
> > consider
> > > that
> > > one of my best acomplishments with the truck.
> > >
> > > In performing the swap, I managed to overlook
> several things
> > and
> > > still
> > > managed to get the whole thing to work. I do not
> have the
> > ALDL nor
> > > do I
> > > have the budget to purchase the OBD-II scanner to
> read the
> > ECM if I
> > > had
> > > the connector. I found this site after finding
> Dave's LT1
> > scanner
> > > on the
> > > web which leads me to one of my biggest questions:
> will
> > Dave's
> > > scanner
> > > work on my 3.4L v6?? If there's any information
> that you
> > need to
> > > answer
> > > this question, please let me know.
> > >
> > > Regarding the VSS, since the truck uses a mechanical
> speedo,
> > I will
> > > need
> > > some way to send the VSS signal to the ECM. The
> truck runs
> > > excellent at
> > > this point without VSS but after reading the
> archive, it
> > looks as
> > > tho I
> > > can get much better mileage with the VSS hooked up.
> I know
> > that my
> > > truck
> > > has cruise control (which doesn't work anyway) so
> I'm
> > wondering if I
> > > can
> > > use the speed sensor for the cruise control that's
> built in
> > to the
> > > speedometer to send the 4000 pulses/mile signal that
> the ECM
> > is
> > > looking
> > > for?? If so, is that 4000 gnd pulses or 4000 +12v
> pulses or
> > some
> > > other
> > > signal that I should be trying to send??
> > >
> > > Drive ecm with open collector
> > > Also, other than mileage, what
> > > other affects would there be from running without
> the VSS??
> > >
> > >
> > > IAC will not reset
> > > Prior to removing the stock 2.8, I had installed
> Edelbrock
> > headers
> > > which I
> > > am now using on the 3.4L. The ECM is looking for 2
> o2
> > sensor inputs
> > > and
> > > the headers are only plumbed for one. Since there
> is
> > continuity
> > > between
> > > the two sensor wires both key on and key off, I am
> only
> > running one
> > > and I
> > > do not have the MIL illuminated at all times. Also,
> the
> > headers are
> > > not
> > > plumbed for EGR so I am planning on finding the
> passenger
> > exhaust
> > > manifold
> > > from the Camaro and grafting the EGR port to the
> headers on
> > the
> > > passenger
> > > side as well as an 02 sensor bung on the driver's
> side. As
> > I said
> > > previously, I do not have a constant nor a flashing
> MIL
> > indicator so
> > > I am
> > > wondering what the consequences of running without
> EGR and
> > the
> > > second o2
> > > sensor may be??
> > >
> > > The ECM was from a manual transmission Camaro and
> the truck
> > has the
> > > 84
> > > 700r4 which seems to be a good match, but I was
> hoping to be
> > able to
> > > use
> > > the ECM to control the TCL once the VSS and other
> issues are
> > > resolved. Is
> > > this possible and if so, what would be involved in
> doing
> > this??
> > > Yep but you need to change prom to auto. Fairly
> cheap for
> > stock one
> > > from gm
> > > Or find someone with a auto bin and getum to burn
> you a chip
> > :-)
> > > I know
> > > the wiring is there in the engine wiring harness and
> I can
> > make the
> > > electrical connections, but certainly it won't be
> that easy
> > since
> > > the ECM
> > > is setup for a manual transmission.
> > > Not ecm, just prom ecm used on both
> > > Also, I am interested in finding out more about
> > reprogramming the
> > > ECM and
> > > was wondering if that would require burning a prom
> or can
> > the ECM be
> > > flashed with new code??
> > > Doh scratch that last idea, I think your ecm is pcm
> and
> > flash
> > > Whatever the answer, if you know where I can find
> > > the equipment to do this, it would help a lot.
> Also, where
> > would be
> > > a
> > > good place to start learning about the inner
> workings of the
> > ECM??
> > > I have
> > > some programming background (VB and Access mainly)
> so the
> > concepts
> > > are not
> > > completely foreign to me.
> > > Any and all help with this is greatly apreciated.
>
> > > Ready to do some reading? :-)
> > >
> http://www.geocities.com/MotorCity/Shop/9938/index.html
> > > <http://www.geocities.com/MotorCity/Shop/9938/index.html>
> > > http://www.cruzers.com/~ludis/
> > <http://www.cruzers.com/~ludis/>
> > > http://www.eecis.udel.edu/~davis/gm-eproms/
> > > <http://www.eecis.udel.edu/~davis/gm-eproms/>
> > >
> > http://efi332.eng.ohio-state.edu/diy_efi/oem/gm/prog_101.html
> > >
> > > Read these over more that once mabe 3 times you will
> get it
> > if you
> > > have the drive :-)
> > >
> > > --UAA03368.940996655/gonzo.wolfenet.com--
> > >
> >
>
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