Testing Spark At Coil: 3.3L
- This system has 3 independent coils. These coils must be tested separately. Remove spark plug wire from No. 2 spark plug. Insert a clean screwdriver into spark plug boot.
- Hold screwdriver approximately 1/4" from ground. Crank engine and watch for spark between screwdriver and ground. Repeat this test for No. 4 and 6 spark plug wires.
- If no spark was present on any cylinder tested, go to FAILURE TO START TEST
. If one or more cylinders has weak or no spark, go to next step.
- Remove spark plug wires one at a time. Using an ohmmeter, measure resistance of each spark plug wire. Resistance should be 3000-12,000 ohms per foot. Replace spark plug wire(s) if resistance is not within specification.
- Measure resistance on primary side of each coil. Resistance should be .5-.7 ohm. Measure resistance between B+ terminal of ignition coil connector and corresponding cylinders. See Fig 1
. Replace coil if resistance is not within specification.
- Remove spark plug wires from coil one at a time. Measure secondary resistance of ignition coil between grouped cylinders and coil towers. Resistance should be 7000-14,000 ohms. Replace coil if resistance is not within specification.
Courtesy of CHRYSLER MOTORS.