Haltech E6X Manual DOS Version - Manual (Page 100)

E6X Manual
100
If the Manifold Absolute Pressure Sensor does not read near atmospheric pressure with the
engine off, or if it shows a fault condition, then check that the sensor is connected correctly.
Check that you have the correct model sensor and that the Identification page information has
been set correctly.
If the Engine Speed reading is erratic, the trigger is most likely picking up ignition noise from
incorrect plugs or leads, electrical noise from cooling fans, starter motor, alternator or other
electrical devices in the vehicle. Ensure that the trigger signal wire is properly shielded and
that the shield is grounded securely.
If the Engine Speed is steady but wrong, check that the Identification page contains the
correct information regarding number of cylinders. Make sure the Multi-tooth trigger type is
not selected unless the engine has a multi-tooth wheel. If using a multi-tooth trigger, make
sure the number of teeth is correctly set for the number of teeth per cam revolution.
If engine parameters are all showing unusual variation, make sure that the ECU is grounded
properly. Also check the engine and chassis grounds to the battery.
A.3 Starting problems
Fuel Pump doesn't prime when ignition switched on
The Haltech E6X will attempt to run the Fuel pump for about 2 seconds just after the ignition
is switched on. The fuel pump relay should be heard clicking in and out with the fuel pump. If
the relay clicks but the fuel pump doesn't work then check the wiring of the fuel pump and the
20A fuse in the fuse block.
Engine makes no attempt to start
Check the following:
ECU is operating (will communicate ONLINE) during cranking
Battery voltage and connections
Fuel Pump runs
Injector fuse is OK and injectors fire
Ignition system is operating properly and spark is available
Ignition timing is correct
If the engine is flooding, reduce the bars in the fuel map that are being used during cranking
in the fuel map, the coolant correction map and the cold prime map.
If the engine is not receiving enough fuel and increasing those bars does not help, check that
fuel pressure is available and that the injectors operate properly (are cleaned and flow-tested).
A.4 Idling Problems
If the engine will not idle when cold but will when the engine is warm then the coolant
correction map needs to be adjusted.
If the engine idles too fast or too slow, and you are using an Idle Air Control Motor, firstly
check that the Idle Speed Control is enabled, and then lower the target idle setting if