Grand Voyager V6-3.3L VIN G Flex Fuel (1999)
Ignition Coil: Testing and Inspection
Testing For Spark at Coil
WARNING: THE DIRECT IGNITION SYSTEMS GENERATES APPROXIMATELY 40,000 VOLTS. PERSONAL INJURY COULD
RESULT FROM CONTACT WITH THIS SYSTEM.
The coil pack contains 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 30 seconds or possible heat damage to catalytic converter will occur.
CAUTION: Test must be performed at idle and in park only with the parking brake on.
Use a new spark plug and spark plug cable for the following test.
Testing For Spark
1. Insert a new spark plug into the new spark plug boot. Ground the plug to the engine. Do not hold with your hand.
2. Starting with coil insulator #1, remove it from the DIS coil.
3. Plug the test spark plug cable onto #1 coil tower. Make sure a good connection is made; there should be a click sound.
4. Crank the engine and look for spark across the electrodes of the spark plug.
CAUTION: Always install the cable back on the coil tower after testing to avoid damage to the coil and catalytic converter.
5. Repeat the above test for the remaining coils. If there is no spark during all cylinder tests, proceed to the Failure To Start Test.
6. If one or more tests indicate irregular, weak, or no spark, proceed to check coil test.
