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Ignition System Starting Test

  1. Remove coil wire from distributor cap. Hold end of wire 1/4" away from good engine ground. Have assistant crank engine, while you watch for spark at secondary wire. Spark should be constant and bright blue.
  2. Remove coil secondary wire from distributor cap and hold l/4" from a good ground. Prepare a special jumper wire assembly as shown in Figure . With ignition switch on, momentarily touch special jumper wire to ground and coil negative terminal. A spark should be obtained at secondary wire.
  3. If spark is good and there is no arcing at the coil tower, secondary voltage is satisfactory. Make sure it is reaching spark plugs by checking distributor rotor, cap, spark plug wires and spark plugs.
  4. If all of these components check okay, ignition system is not at fault. Check fuel system or mechanical engine damage.
CAUTION: Perform "Ignition System Starting Test" first. Failure to do so may result in lost diagnostic time or incorrect results.
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