Reply to Squash's reply about What ECM should I use for my Mopar 440 conversion project?

[ae2598 at wayne.edu]

I'm not sure the external connectors can be used as an indication of the
"family" of ECM.  The 165 uses the exact same plugs as the '062, which I'm
pretty sure is a C3.

 On Fri, 16 Mar 2001, Bruce Plecan wrote:

> 
> Nope the P4s use 3 connectors on the ecm.  It also uses a memcal, which is a
> series of chips on a carrier.  Uses an eprom just like the C3s but are much
> larger.   All the program info is on the memcal.
> Bruce
> 
> 
> ----- Original Message -----
> From: "Brian Roth" <broth at sanjuan.edu>
> To: <gmecm at diy-efi.org>
> Sent: Friday, March 16, 2001 2:24 PM
> Subject: Reply to Squash's reply about What ECM should I use for my Mopar
> 440 conversion project?
> 
> 
> > What is a P4 device? Does it still have a 24 pin and a 32 pin connector?
> Is
> > it externally tunable? Is a lap top and software required?
> >
> > Brian
> >
> > > ----------
> > > From: Squash
> > > Reply To: gmecm at diy-efi.org
> > > Sent: Friday, March 16, 2001 5:06 PM
> > > To: gmecm at diy-efi.org
> > > Subject: Re: What ECM should I use for my Mopar 440 conversion
> > > project?
> > >
> > > I would try wiring in a 95 pickup ECM or some other P4 type device, even
> > > if you have to change
> > > injector drivers.  I just cannot fathom tuning something like that with
> a
> > > 747...
> > >
> > > Squash
> > > p.s. tunercat has a TDF for the 95 truck
> > >
> > > --- Brian Roth <broth at sanjuan.edu> wrote:
> > > > I have sourced a wiring harness for my Mopar 440 to GM TBI conversion
> > > > project. It looks like I will be getting the harness from a 4.3 Astro
> > > van.
> > > > According to my research using AllData's wiring diagrams the 4.3, 5.7
> > > and
> > > > 454 harnesses are essentially the same. It looks like I may have to
> > > reroute
> > > > a few wires. I will probably be getting all the sensors as well and I
> > > will
> > > > attempt to use the Astro van fuel pump suitably modified for external
> > > use as
> > > > I have done with my Ford 5.0 EFI powered  Mitsubishi pickup.
> > > >
> > > > Now I need a throttle body (which I think I have located) and an ECM.
> > > >
> > > > Which ECM should I use? Can I use one from a 4.3 Astro or S10 or do I
> > > have
> > > > to have one from a V8? Doesn't the computer determine engine speed
> from
> > > the
> > > > distributor which would make it off by two cylinders if it counts
> every
> > > > pulse if I use a 6 cylinder ECM on an 8 cylinder? Do I need an ECM for
> a
> > > > truck?   It looks to me like the truck ECM's and the car ECM's do not
> > > even
> > > > have the same connectors.
> > > >
> > > > How about the distributor pickup? Someone wrote me that I can put a GM
> > > > pickup in my mopar distributor. Can I use a pickup from a  4.3 or even
> a
> > > 2.8
> > > > for that matter or does it have to come from a V8. How about a Caddy
> > > 4.1? Do
> > > > I have to start with a mopar dissy that has no advance or can I just
> > > disable
> > > > the mechanical and vacuum advance on my current dissy?
> > > >
> > > > My primary goal in doing this conversion is to improve the fuel
> economy
> > > on
> > > > my motorhome which got 5 mpg on our last trip but should get about 7
> mpg
> > > > with a properly tuned carbueretor (Now using a Quadrajet instead of
> the
> > > > stock ThermoQuad). I am hoping for about 9 mpg after the TBI
> conversion.
> > > > What kind of mileage does a 454 TBI powered rig get when it is working
> > > hard?
> > > >
> > > > Brian
> > > >
> >
> > --------------------------------------------------------------------------
> > > --
> > > > To unsubscribe from gmecm, send "unsubscribe gmecm" (without the
> quotes)
> > > > in the body of a message (not the subject) to
> > > majordomo at lists.diy-efi.org
> > > >
> > >
> > >
> > > =====
> > > Trains, Trucks, and EFI at
> http://www.trailrunners4x4.org/users/realsquash
> > >
> > > __________________________________________________
> > > Do You Yahoo!?
> > > Get email at your own domain with Yahoo! Mail.
> > > http://personal.mail.yahoo.com/
> >
> > --------------------------------------------------------------------------
> > > --
> > > To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
> > > in the body of a message (not the subject) to
> majordomo at lists.diy-efi.org
> > >
> > >
> > --------------------------------------------------------------------------
> --
> > To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
> > in the body of a message (not the subject) to majordomo at lists.diy-efi.org
> >
> 
> ----------------------------------------------------------------------------
> To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
> in the body of a message (not the subject) to majordomo at lists.diy-efi.org
> 
> 


----------------------------------------------------------------------------
To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
in the body of a message (not the subject) to majordomo at lists.diy-efi.org