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widening the gap to 1/4-3/8". Disconnect spark plug wire and insert test plug. Ground plug, crank engine, and check for spark.
GOOD SPARK
NO SPARK
* If plug sparks, driveability
* Remove coil wire from the problem is most likely NOT
distributor and attach the in the ignition system.
modified spark plug. Ground
the plug and crank engine
while checking for spark.
GOOD SPARK
NO SPARK
* If plug has a good spark,
* Proceed to the IGNITION the problem is in the plug
PRIMARY TROUBLE SHOOTING wires, distributor cap, or
CHECK CHART below in this rotor. Replace components
article. as necessary.
Ignition Primary Trouble Shooting Chart START: Visually inspect primary ignition wires for broken, frayed, split, or cut wires. Also check for loose, corroded, or disconnected connectors.
OK
NOT OK
* Check that battery voltage
* Repair or replace damaged is at least 11.5 volts.
components as necessary.
NOT OK
OK
* Replace or recharge the
* Check for battery voltage battery.
at the positive terminal of
the coil.
OK
NOT OK
* Check air Gap of the Pick-Up
* Check resistance of ballast coil in the distributor.
resistor (if used) for the
correct resistance value.
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