Haltech E6X Manual DOS Version - Manual (Page 76)

E6X Manual
76
In this case, the ECU will use the last measured pressure, which is stored in memory with the
maps.
To complete Method 2 follow these steps:
1. Set the Barometric Lock in the Fuel Set-up page to “disabled”.
2.
Make sure the throttle position sensor is properly calibrated. It must exceed 96%
throttle for this to work. Also make sure that the MAP Sensor is set correctly in the
Identification.
3.
Switch the ignition off.
4.
Apply full throttle.
5.
Switch the ignition on but DO NOT crank the engine.
6.
Wait till the fuel pump prime finishes (about 5 seconds) then release the throttle.
The current barometric pressure as read by the MAP Sensor will be programmed
into the ECU’s memory.
It is not necessary or advisable to perform this reset regularly. It should only be done if
the vehicle’s regular place of garage is moved or if problems are suspected in the barometric
correction. For example, if an engine is tuned at sea level but is intended to be used mainly at
a higher altitude, then the reset should be performed once it reaches its new regular location.
After that, the automatic reading done at start up will be sufficient for the ECU to apply
barometric compensation.
9.5.3 Barometric Correction - Method 3
This method of barometric compensation allows the ECU to continuously measure barometric
pressure and adjust the fuelling throughout the period of operation.
This method requires the user to access the Fuel Set-up page:
- Set “Barometric Lock” to “Disabled”.
This method can only be used if a barometric pressure sensor is connected to the ECU to
provide continuous barometric pressure readings. The ECU contains an internal barometric
pressure sensor for this purpose. To configure the internal barometric pressure sensor refer to
4.2.4 The In/Out Set-up Page, p49.
An external 1 Bar MAP Sensor (left open to atmosphere) can be used in place of the internal
barometric pressure sensor. The hardware connection of this sensor differs based on the
method of load sensing used:
When the ECU is configured to measure load by throttle position, the external MAP
sensor is connected to the MAP sensor input. The ECU will automatically use the
signal on the MAP sensor input for barometric correction.