Haltech E6GMX - Manual (Page 91)

E6GMX Manual
91
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 E6GMX 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
difficult to drive when cold, particularly with gear changes, try increasing the coolant
correction factor for the throttle pump.
An engine that will idle when warm, but fails to idle cold unless a tiny amount of throttle is
applied may require idle speed control, with a fast-idle function for when the engine is cold.
The E6GMX can control an Idle Air Control motor that will perform this function.
A.9 Fuel Consumption
Poor fuel consumption is a result of a too rich mixture. If the fuel consumption in traffic is
poor but the highway consumption is good, then it could be the areas of the map used for
accelerating that need to be leaned out. The throttle pump may also waste fuel if its values are
too high. Also try using the fuel cut off on deceleration feature.
If the city consumption is fair but highway cruising uses too much fuel then lean out the light
load bars on the 2000 rpm to 3000 rpm maps (This is where most cruising takes place).
If the cold start map is supplying too much fuel on warm-up this will also affect the fuel
consumption of the vehicle.