Haltech E6X Manual DOS Version - Manual (Page 101)

E6X Manual
101
necessary. If not using the idle air control motor then adjust the idle using the idle adjust
screw on the throttle body. Check for any air leaks in the manifold.
Check the ignition timing at idle and adjust if necessary.
If the engine surges or hunts at idle then the mixtures and timing are wrong. Readjust the fuel
maps near idle conditions.
In some circumstances it may be necessary to use the Zero Throttle Map. Consult Chapter 6
[6.2] for information on using the Zero Throttle Map.
A.5 Light throttle and Cruising Problems
If the engine falters under light load then the mixtures might be too lean, check the Fuel
Maps.
A.6 Full Power Problems
If the engine gasps under full throttle then the mixture may be too lean. If the engine bogs
down and blows smoke then the mixture is rich. Recheck the fuel maps.
If the maps appear to be correct then ensure that the fuel pressure is not falling out of
regulation by using a fuel pressure gauge. Flow test and clean the fuel injectors.
In some circumstances it may be necessary to use the Full Throttle Map. Consult Chapter 6
[6.3] for information on using the Full Throttle Map.
A.7 Throttle Response Problems
Throttle response of the E6X is set using the three pairs of throttle pump settings. If the
engine gasps and flat spots (misfires) when the throttle is suddenly opened then the throttle
setting is not high enough or is much too high. If the engine bogs down but continues to run
then the mixture is too rich. Experiment with the throttle pump settings to achieve the
optimum.
The throttle pump coolant factor affects the throttle pump only when coolant correction is
being applied, i.e. before the engine has reached operating temperature. Set the throttle pump
increase and sustain figures only when the engine is warm. Wait until the engine is cold again,
and the coolant correction map has been set for good stable running, before changing the
coolant factor.
A.8 Cold Running Problems
If the engine idles poorly when cold then the coolant map may need adjusting. If the engine is
hunting slightly when cold, then the coolant correction map is just too lean, and so needs a
small amount of enrichment. Slight advance with the coolant temp. can help. If the engine is