Testing For Spark At Coil
The ignition system generates approximately 32,000 volts. Personal injury could result from contact with this system.
Spark plug wire damage may occur if the spark plug is moved more than
inch away from the engine ground.
Do not leave any one spark plug cable disconnected any longer than necessary during test or possible heat damage to catalytic converter will occur. Total test time must not exceed 1 minute. Use a new spark plug and spark plug cable for the following test.
Insert a new spark plug into the new spark plug boot. Ground the plug to the engine.
Remove the distributor cap.
Plug test spark plug cable onto coil tower.
Crank engine and look for spark across the electrodes of the spark plug. If there is no spark, check the distributor connectors:
Fig. Distributor connectors
Continuity from PCM pin 11 to 6-way connector terminal 1
Continuity between ground and 6-way connector terminal 2
Continuity from PCM pin 6 to 2-way connector terminal 2
Correct resistance in distributor cap, refer to Distributor Cap Resistance Test.
If all circuits show continuity, replace distributor assembly