Haltech E6A - Manual (Page 17)

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2 Bar Sensor (Part No. 886 3189)
(-100kPa to 100kPa) Turbo or Supercharged
Engines up to 100kPa boost
(15 psi , 1 atmosphere)
3 Bar Sensor (Part No. 749 3169)
(-100kPa to 200kPa) Turbo or Supercharged
Engines up to 200kPa boost
(30 Psi, 2 atmospheres)
Note: Make sure you have the correct MAP sensor for your engine. The first three digits
of the part number is stamped on the sensor housing.
Engines running in Throttle Position Mode must use a 1 Bar sensor, not connected to
the manifold, so as to measure the barometric pressure.
Installations using a Barometric Pressure sensor will have two MAP sensors to connect.
One sensor will be for the Manifold pressure, the other will be for Barometric pressure.
The Barometric sensor must be a 1 Bar sensor. It connects to the Spare Input plug near
the Main Connector. This sensor can be mounted with the ECU and must be left open to
the atmosphere.
Mounting
The MAP sensor is usually mounted high on the engine bay firewall or inner guard using two
screws and with the hose nipple facing outwards. Connect the sensor to the inlet manifold via a
short length of vacuum hose and fasten with either hose clamps or nylon cable ties. Connect
the sensor to the main wiring harness using the appropriate plug. (For 1 Bar sensors the plug is
green, for 2 and 3 Bar sensors the plug is orange). Avoid mounting the sensor below the level
of the fuel injectors, because fuel may collect in the vacuum hose and run down into the
sensor. The sensor assembly is weather-proof but it is good practice to mount the sensor in a
protected position away from moisture and heat.
Note: Throttle position mode installations.
If you are using the throttle position to determine engine load, a 1 Bar MAP sensor must be
used, disconnected from the manifold and open to the surrounding air. The E6A will use the
sensor signal to compensate for barometric pressure.
1.3.2. Coolant Temperature Sensor
The coolant temperature is used by the computer to determine warm up corrections and adjust
fuel mixtures.
The coolant temperature sensor has a solid brass temperature sensing tip. Refer to the diagram
for technical details of the sensor. The coolant sensor supplied is an industry standard
component and some engines may already have provision for this type of sensor.