Step 1: Invite a friend over to you garage to help you test.

Step 2: Remove the #1 spark plug. Leave the wire attached.

Step 3: Have your friend place the #1 spark plug in his mouth. Have him take a firm grip on a bare surface on the engine.

Step 4: Turn the engine over.

Step 5: Measure the body imprint in the roof of the garage. - Full body through the roof: Ignition is fine. - Body partially imbedded in roof: Replace the condenser. - Friend still standing there, looking gullible: Replace rest of ignition components.

Step 6: find new friends.

As you can see, this is a simple, straightforward technique for testing the ignition system on your bus.

Parental Warning ! - Kids don't try this at home