Distributor Ignition (G20): Spark

Check for spark at each spark plug wire using spark tester. Check spark plug wire resistance on suspect wires. Resistance should be 4.15-5.61 k/ohms per foot at 77°F (25°C). Check ignition coil, power transistor and circuits. See DTC P1320: IGNITION SIGNAL under DIAGNOSTIC TESTS in SELF-DIAGNOSTICS - G20 article.