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Louies Web Site
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Date: 1-17-2011
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Number of Hours: 5.50
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Manual Reference:
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Brief Description: Ignition system simulator
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Added another mount location on the trigger wheel base plate for a sensor at 120 degrees from the sensor #1 position. Mounted the sensor spaced 0.025" from the wheel. Connected EDIS #1 and #2 to the sensors, and to power. Connected the outputs of both EDIS modules to the coil pack. EDIS #1 outputs 10, 11, 12 connect to coil pack pins 1, 2, 3. EDIS #2 outputs 10, 11, 12 connected to coil pack pins 3, 1, 2. This should allow the coils to fire in the same time relationship whether EDIS#1 or EDIS #2 was active. Connected MJLJ #1 to EDIS #1 and power and tested it. Connected MJLJ #2 to EDIS #2 and power. Loaded the same tuning file from MJLJ #1 into MJLJ #2. Tested both EDIS and MJLJ #1 and #2, Both work as they should to fire the plugs. However, both EDIS/MJLJ cannot be used together or timing instability occurs. One system has to be used at a time. Tested timing of all 3 coil outputs with reference to crank sensor #1 with either EDIS/MJLJ #1 or EDIS/MJLJ #2. Found the coils fire in the sequence of A, C, B. That is EDIS outputs pin 10, 12, 11. Opened up the spark plug gaps to about 0.150" to cause the coil to generate higher voltage and stress the system more than with normal plug gap. The voltage spike on the coil primaries is 350 volts at about 8 us wide when the spark fires. This voltage spike didn't change whether the plug gap was 0.030" or 0.150". Left the simulator running at 3000 RPM on system #1.
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