Re: EFI ramblings

[rr <RRauscher@nni.com>]

Know what you mean, mines at 9.5 volts 'right-away'. It does remain
steady though.

This injector decay is very consistant. Just stop cranking for an
instant, and re-crank to get full pulses back. I haven't seen anything
in the code to do this, hmm. Now I am wondering. Maybe it's
built into the rfd chip?

Anyone else observe this?

BobR.

I think the code really reads Vbat for the fuel pump volts,
been a while since I've looked at it. Many '747 bins have
the fuel pump volts error code disabled.

Bruce Plecan wrote:

> I forget exactly how the 747 looks at battery voltage wither it's thru the
> fuel pump voltage or what, so the battery voltage correction applies alot
> toward cranking.  espeically if the cranking is marginal to the injector or
> ignition min rpm end of things.
>   Lots of cars are at a full 14v for starting, and it quickly *can* drop to
> 9.5v..
> Grumpy
>
> > Did you know that during a crank and no-start condition,
> > the ecm decays out the injector pulsing? Must be an
> > anti-flood technique. '747 of course. . .
> > BobR.
>
> ----------------------------------------------------------------------------
> To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
> in the body of a message (not the subject) to majordomo@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@lists.diy-efi.org