Starting the engine for the first time.
If you are using coil packs or direct coils see the Direct Fire Ignition section below before
starting the engine.
Items required.
You will require the following items before attempting to start the engine.
Ignition timing light.
Exhaust gas analyser.
Have these connected before attempting to start the engine.
Software.
1. With the PC connected to the SM4 and the calibration software running, turn on the
ignition (you should hear the fuel pump start and then turn off) and select “Go online”
from the File menu or press F3.
2. Press Alt+4 to open menu M4 and select the Idle ignition table. Set all RPM
values to 10 degrees.
3. Press Alt+1 to open menu M1 and select Base settings. You will need this window
visible when starting the engine so you can increase or decrease the Overall fuel mult to
change the overall fuel trim to get the engine running smoothly.
4. Calibrate the throttle. See Throttle Limit Learning in this manual.
5. Before starting the engine check the on screen real time engine data to see if everything
makes sense
e.g:- air and water temperatures are correct, throttle position is linear from 0 to 100%.
Starting the engine.
1. Start the engine.
Check the analyser to see the air fuel ratio is between 12.7 and 11.0, change the
Overall fuel mult to achieve a suitable air fuel ratio the will resalt in smooth running.
As the engine warms up the air fuel ratio will get leaner. When the engine is up to
operating temperature the engine should be idling on 13.0 to 14.7 air fuel ratio. Use the
Overall fuel mult to make corrections.
Press F4 to lock the changes into the SMC.
2. Use the timing light to check the ignition timing matches the “Ign. Angle-MEAN-“
displayed in the real time engine data. If they do not agree do the following.
Distributor:- Turn the distributor body or change Crank IP Lead
Crank trigger:- Move the sensor or turn the trigger disk or change Crank IP Lead
To Next Page
Loading...
Need help?
General