Let's begin with the supply of the ignition coil. You'll need a multimeter or a test bulb.
Connect the multimeter (in DC 20V range) or the test bulb to the primary winding terminals
of the coil. With ignition on check the presence of the supply voltage between the terminals
(the bulb should lit or on the multimeter you should read at least 11.5 Volt).
- If no voltage detected push the car in 5th gear a few inches and recheck the
voltage on the terminals. Now if you can measure voltage (or the bub lits) then it's coil failure.
- If there's voltage on the terminals sloooowly push the car in 5th gear to see the
voltage disappear. If the supply voltage remains steady after 6 feet of dead slow pushing,
then the power module doesn't get control pulses or the module itself became defective.
If you don't want sparks during cranking one of the primary winding supply of the igniton
coil should be interrupted. Otherwise the high tension will attack the weakest point of the
internal insulation which may lead to coil failure.