Haltech E6M - Manual (Page 68)

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Alternatively if TPS load sensing is being used the MAP sensor may be connected to the
MAP input on the wiring loom since this is free when using TPS load sensing. In this case
make sure that the Spare Input function is not set to Baro Sensor. The E6H/E6M will
automatically recognise the external 1 Bar MAP sensor at the MAP connection. No further
configuration is required.
Completing Method 3
The E6H/E6M software contains a barometric compensation map that allows the fuel delivery
to be reduced as the barometric pressure falls. As a final step to complete Method 1, you have
the ability to adjust a dedicated barometric correction map. The fuel can be trimmed
±
50%.
When sensing load via Throttle Position Mode, the Barometric Correction Map should look
something like the following:
When sensing load via Manifold Pressure Mode the Barometric Map Should be very close to
zero fuel reduction. In theory a Manifold Pressure tuned engine will not require any
barometric pressure compensation, but in practice it has been found that slight compensation
is required. The barometric compensation map should therefore be very close to a straight line
at zero fuel enrichment/reduction:
8.6 Post Start Enrichment
On some motors, in particular rotaries there is a problem with vapour-lock (fuel which due to
heating of the fuel rail has vaporised). The additional fuel at start up allows the vapour in the
fuel rail to be purged through the injectors and also allow enough fuel to be injected into the
motor to allow stable operation. Post start can also be used to give extra enrichment when the
engine is cold to assist drivability.