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I've used a spark plug wire directly into the coil then the extra plug grounded on the chassis. With the key on and 12 VDC at the black wire, grounding and then releasing the terminal where the green wire from the DME connects should cause a spark across the plug. You can run a jumper from the battery to the coil and not turn on the key to do this. With the power jumper you are just checking the coil. With the key on and cranking the car you are checking the coil, the sensors and the DME's reading of the sensor pulses.
There have been problems on the older DME's where the large transistor that fires the coil has come unsoldered from the PC board. Search for the thread on it.
If you have an older volt meter with an analog meter you can see the plus 2 volt pulse that the front sensor puts out when the pin passes by during cranking.
Check that the coil is good first. Then check at one of the spark plugs -- dist between the coil and plug. Could have a burned out rotor.
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Hugh - So Cal 83 944 Driver Person
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