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Home >> Ford >> 1992 >> Crown Victoria Base, AOD >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Controls - System/Component Tests - EEC-IV >> Dis System (TAURUS 3.0L SHO & THUNDERBIRD 3.8L SC) >> Pinpoint Test G

Pinpoint Test G

  1. Talk to vehicle operator to determine symptoms. Review vehicle service history, including previous repairs and components replaced. If engine starts, go to step 2). If engine does not start, go to PINPOINT TEST A.
  2. Wiggle Test  With engine at idle, raise hood, wiggle wiring harness and pull wires at ignition component connectors. If engine stalls, service harness and connectors as necessary. Check DIS mounting bolts. Rerun QUICK TEST, and service any codes present. If engine does not stall or miss, proceed to step 3).
  3. Hot Soak Check  With engine off and hood closed, hot soak for 10 minutes. If engine restarts, go to step 4). If engine does not restart, go to PINPOINT TEST A.
  4. Wiggle Test After Hot Soak  With engine at idle, raise hood, and perform wiggle test on connectors of primary ignition components. If engine quits, service harness or connector. Rerun QUICK TEST. If engine does not quit, go to step 5).
  5. Road Test  Road test vehicle. If engine quits, go to step 6). If engine does not quit, test is complete.
  6. Wiggle wiring harness and pull wires at connectors. If engine quits, service or repair harness or connector. Separate and reconnect connectors for ignition components. Rerun QUICK TEST. If engine does not quit, go to step 7).
  7. Check Sensor Shield  Turn ignition off. Measure resistance between crankshaft sensor shield (find exposed shield in sensor cable) and negative battery terminal. If resistance is less than 5 ohms, go to PINPOINT TEST A. If resistance is 5 ohms or more, service or repair shield ground circuit.
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