[Gmecm] Olds 307 injection alive

[David Allen]

Congrats on getting it to run, Chris!
  While I haven't worked with your exact ECM, mine will simply not work at
all if the chip is in backwards or the emulator isn't plugged in correctly.
It will do any manner of unpredictable things if the chip is not seated
completely.  Just my $0.02 worth!
  On my car, the ECM will not actuate the pump prime function if the
ignition hasn't been OFF for a certain amount of time since it was ON last.
In other words, if I turn the ignition OFF and then back ON immediately the
fuel pump will not run for 2 seconds.
  As for the fuel pump, on my Nova the pump is mounted above and forward of
the tank.  There's probably about 6' of fuel line between the pump inlet and
the fuel tank.  I've had the same used pump in there for 5 years now without
problems.
  HOWEVER I must say these pumps are completely intolerant of foreign
objects.  I locked up one on my boat EFI retrofit.  You can sandwich a
standard "faucet screen" between the Ford inline pump and the inlet fitting.
This screen could clog easily so it requirse filtration before hand.   It is
just a safety factor to prevent an instant catastrophic pump failure if one
piece of debris gets in the line between the tank strainer and the pump.
  On my boat there is a standard marine spin-on fuel filter between the tank
and the pumps, and on my 1972 Nova, I adapted a "sock" designed for an
in-tank pump so it would be on the inlet tube inside the fuel tank. I used
JB Weld to attach the sock to a flare fitting, then placed a flare nut on
the pickup tube and flared it so the sock could be attached.
  Since yours is temporary, just install an inline strainer in the suction
line, like that used on a Cummins engine to keep from killing the pump.
Best of luck!
David



----- Original Message ----- 
From: "Christian E. Carson" <fastcarson at prodigy.net>
To: <gmecm at diy-efi.org>
Sent: Monday, July 11, 2005 1:09 PM
Subject: [Gmecm] Olds 307 injection alive


> Well, after several months of parts collecting and engine swapping, I've
> finally put enough parts together to actually get the 307 in my '90 Custom
> Cruiser to start and run with the MPFI Seville intake.  But I still have
> several other dilemmas...
> I'm using the Moates memcal adapter board with ZIF socket. I tried putting
> the PROM into the socket in the orientation the website tells you to (pin
1
> facing away from the memcal side) but the ECM will not go into diagnostic
> mode or field service mode. When I flip the chip around, it will flash 12
> with the engine off, so I figure I'm on the right track.  If the code in
the
> PROM is corrupted or if it is installed incorrectly, will the ECM flash a
> code or simply not function? This is what it seems to be doing, but I'm
> boggled as to why it only works in the opposite direction from the
"correct"
> way.
> Is there a time when the fuel pump relay will not be energized for the 2
> second period with the key on, like when the PROM is misinstalled? I had
to
> jump the relay to get it to work, but I didn't test for voltage when I
> flipped the PROM around again.
>
> One more question: how close to the fuel tank must an external (Ford
truck)
> fuel pump be plumbed? The fuel tank is rusty and I've got a 92 fullsized
> wagon tank (with internal fuel pump) to go into it, but I've got to drive
> the car about 1/2 mile to my house from my barn (where there is no
> electricity!) in order to cut the straps and torch the rusty fuel tank
bolts
> out of there!! (after of course removing the fuel tank! :) ) So I'd rather
> hook the pump up to "suck" from the existing low pressure lines but I'm
> wondering how quickly it will kill the pump.  Can I use the mechanical
pump
> to prime the high pressure pump without a surge tank?
> Thanks much,
> Chris
>
> _______________________________________________
> Gmecm mailing list
> Gmecm at diy-efi.org
> http://lists.diy-efi.org/mailman/listinfo/gmecm
>