Checking Plugs & Wires

Crank engine. Using a high-output spark tester, check for spark at both spark plug wires of each coil. If there is no spark at all coils, go to CHECK FOR VBAT TO ICM. If spark is missing from both spark plug wires of one or 2 coils, go to CHECK VBAT FOR OPEN TO COIL. If spark is missing from one wire, replace spark plug wire and spark plug. Recheck ignition system.