With Scan Tool

1. Turn key OFF.

2. Connect a Rotunda Spark tester D81P-6666-A, or equivalent, between the #1 spark plug wire (plug end) and ground.

3. Crank engine using ignition switch.

4. Repeat for all spark plug wires.

- If sparks were present, See Fuel Delivery and Air Induction.

- If sparks were not present, See Ignition System.