Haltech E6X Manual Win Version - Manual (Page 63)

E6X Manual
63
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6.5.4 Tuning for Idle
The idle mixture is very sensitive to correct bar height. Idle injection times are usually around
1.5 to 2.5 ms, if the injection time at idle is much lower than this, it may become difficult to
set accurate idle and cruise mixtures.
If the engine is hunting at idle, then the map is probably too lean, particularly in the 500rpm
range. Watch the movement of the map arrow carefully. The map arrow pointer should
remain stable while the engine is idling. If the arrow is moving excessively in a MAP based
system, then it may be necessary to use the Zero Throttle Map refer to 5.3.6 Zero Throttle
Map, p58.
Once the engine will idle it is a good idea to wait for the engine to reach operating
temperature before performing further changes to maps. This can be established by checking
the coolant temperature reading in the engine data page.
6.5.5 Tuning with No Load
Using the throttle only, increase the engine speed to 1000 rpm. When the engine speed is
exactly 1000 rpm the ECU will use only the bars in the 1000rpm range for fuelling
calculations meaning no interpolation from adjacent ranges will affect the mixtures. Repeat
this process for engine speeds 1500, 2000, 2500, 3000 etc. The engine should now start and
fast idle evenly. Go to the Engine Data Page at this point and check all the sensor inputs are
reading correctly, and that the temperatures have stabilised before continuing.
While free revving at higher engine speeds, check the engine speed on the engine data page.
If it becomes erratic, or fails to follow the actual engine speed correctly, check the trigger
wiring and make sure that the information in the ignition set-ups is correct. If you continue to
have problems refer to the troubleshooting guide in the appendix.