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Disconnect in-line connector near TFI module. Install Spark Tester (D81P-6666-A) between ignition coil wire and engine ground. Crank engine. Turn ignition off. If spark was present, check PIP and ignition ground wires for continuity. Service wiring as necessary. If wires are okay, see appropriate EEC-IV article in COMPUTERIZED ENGINE CONTROL section listed below. If spark was not present, go to IGNITION COIL SUPPLY VOLTAGE test.