Testing for Spark at Coil

Fig. 1 Testing For Spark:

WARNING: The direct ignition system generates approximately 40,000 volts. Personal injury could result from contact with this system.

The coil pack contains 2 independent coils. Each coil must be checked individually.

CAUTION: Spark plug wire damage may occur if the spark plug is moved more than 1/4 inch away from the engine ground.

CAUTION: 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 one minute.

CAUTION: Test must be performed at idle only.

1. Remove the cable from number 2 spark plug.
2. Insert a clean spark plug into the spark plug boot, and ground plug to the engine (Fig. 1).
3. Crank the engine and look for spark across the electrodes of the spark plug.
4. Repeat the above test for the three remaining cylinders.
- If there is no spark during all cylinder tests, proceed to the failure to start test.
- If one or more tests indicate irregular, weak, or no spark, proceed to Check Coil Test. Testing and Inspection