11. You may now crank the engine without the 10 way connector. Check that the Green LED
flashes. Also look at the RPM signal on the timing map. It should show 200 to 300 rpm
constant. If it shows erratic and run wild, do not try to start. First find the fault. It must be
constant.
12. The vacuum should be reading the atmospheric pressure of your region. Check the Internet
for the correct pressure on you altitude.
13. Save the data if it has been changed.
14. Switch the ignition off and connect the 10 way connector.
15. Remove all the fuses. Switch the ignition on. The relays will come on for three seconds the
fall out again. If not check the relay wire according to the drawing.
16. Switch the ignition off and insert the fuel pump fuse. Start with 5A. If it blows check the
wiring and try 7.5A as some pumps draw more power than others. Do not go to larger amp
fuses as there may be short somewhere.
17. Switch the ignition on, the fuel pump must start for three seconds and switch off.
18. Switch the ignition off and insert the coil fuses of 5A. If it blows check the wiring.
19. Now crank the engine with a timing light and check if the spark timing is in the 10°BTDC
region. If not check the Timing Chapter for the correct setup. Do not attempt to start if the
timing is not right or erratic. You may need to loosen the plug wire a bit to make a small gap
so that the timing light picks up the pulse of the spark plug. For coils that are bolted onto the
plug try using the trigger wire from the ECU. If this does not work, take a separate wire and
wound it three times around the inductive pickup of the timing light and then insert this wire
between the trigger wire and the coil. This will amplify the signal three times so that it will
trigger the timing light. Set the timing light to zero timing as wasted spark systems read
double the degrees.
20. Switch the ignition off and insert the injector fuses of 5A. If it blows check the wiring.
21. Crank the engine. It should start. If the engine backfires or misses stop and do some
checks. See the Faultfinding chapter to guide as to what the symptoms may be.
22. The vacuum bar should move to the left of the map while cranking at closed throttle. If your
setup is correct it should start and idle smoothly.
23. Make sure the RPM is constant before revving the engine. If it jumps more than 300 rpm
intervals, recheck the trigger polarity. It must be steady.
24. Look at the exhaust. If there is black smoke, it is very rich. Try leaning it out on the water
temp graph by lowering the dot on the right side of the yellow bar.
25. During the heating up faze, blip the accelerator from time to time. If the engine has a flat
spot it may be lean and need some more fuel. Adjust the main jet till the flat spot reduces.
26. The green LED in the Idle control should go off once the target RPM is reached. If it flashes
then the ECU is trying to control the idling but nothing happens. It means the fault is to the
idle motor side. Maybe a wiring fault or sticky motor or valve. It may also be a blocked
airway or the throttle opening is too large. Remember for every 19% of enrichment on the
water correction graph, the ECU will raise the set RPM’s by 100.
27. As the engine heats up, the water sensor value must increase. Adjust the mix on the water
graph or by lowering the main jet slider till the engine is at normal temperature.
28. The water graph should now be around 85°C with no fuel enrichment. If it is not, you can
calibrate the sensor on the setup page. The engine should rev up smoothly. If it has a flat
spot it requires more fuel. Increase the main jet slightly till the flat spot is about gone. Also
check that the timing is not the result of the flat spot. Check with the timing light that the
timing increase as the software indicates.
29. Let the engine idle and adjust the idle jet till it idles smoothly. Always try to make the
mixture as lean as possible because it is difficult to feel when it is too rich.
30. Save the data to the ECU. The car may stutter and die. Restart again and proceed with
tuning.
9. Tuning Principles
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