[Diy_efi] fuel injection for an airplane engine

[Tomas Sokorai Sch.]

On Tuesday 28 May 1996 13:00, Bruce wrote:
> > Yes, that's a problem when the barometric correction factor is
> > sampled at engine startup (usually because there is only one
> > MAP sensor), then remains constant as long as the ECU isn't
> > rebooted.  To get around this, put in another MAP sensor
> > and sample it all the time for the current baro factor.
>
> That's not universally true.  On some GMs they do a recalc under certain
> circumstances, ie, to corrrect for climbing a mountain, etc..
> Bruce
>
The same is true for other MAP based ECUs, for what I've read, the Renix 
system (from a 4.0L early 90 Jeep Cherokee) does the barometric sensing at 
startup and WOT as they are the only times when the MAP sensor is exposed to 
the whole atmosferic pressure.

Tomas

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