Haltech E6A - Manual (Page 52)

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• The sixth character in the ignition timing Map name specifies the extra ignition advance
to use at light loads such as highway cruise. This is equivalent to the vacuum advance on
a distributor. If this character is A, there is no extra advance under light load. Each
successive letter of the alphabet after A adds 3 degrees of ignition advance to the full
load advance under light load, up to the letter H. (H = 21°)
• If the engine is turbocharged or supercharged then the seventh and eighth characters
specify the ignition retard the engine is to get under boost. This value is subtracted from
the atmospheric pressure advance value. If the engine is not turbocharged or
supercharged, then leave the name only six characters in length.
A description of each parameter is displayed on the Library Maps page to save you referring to
this manual.
As mentioned above, it is suggested that the timing be checked before starting the engine. If
the ECU successfully locks the timing at 10° then you should load a library map that will get
the engine started. Try be conservative : you should not be looking to gain the last few percent
in performance immediately. If you know the factory settings for idle, vacuum and full load
advance for your engine you can use those values to load an extremely effective Library Map.
5.5 Determining Engine Fuel Needs
You should now be ready to start the engine. At this stage, you should not be using the Zero
Throttle Map. Check that it is disabled in the Fuel Setup. Go to the Fuel maps and display the
0 rpm range. During cranking, the pointer will appear across this page, until the engine speed
picks up and lifts into the 500 and 1000 rpm ranges. Press the
² ²
key to jump to the current
load point immediately.
If you are using manifold pressure as the load sensor, the engine will be close to atmospheric
pressure during cranking. If you are using throttle position, then the E6A will be using bar 1
while cranking and idling. Once the engine is tuned, you should not need to apply any throttle
to get the engine to fire. When cranking the engine watch for the indicator arrow over the bars.
This will tell you what bar the E6A is using to calculate the fuel. The bars that the arrow
indicates are the Bars that will need to be adjusted to get the engine to run.
If the engine is not firing at all, check that spark is available. Also check that the spark plugs
are clean and are not wet. It is unwise to crank on the starter motor for extended periods. The
engine should fire and run within the first few seconds of cranking.
If the engine misfires and blows black smoke then the mixture is rich and the bars need to be
lowered. If the engine will not fire or fires but will not continue to run then the mixture could
be lean and the bars need to be increased.