Test 2, Check For Spark During Crank

1991 Ford Aerostar Van Cargo Extended, 4.0 X, AWDSECTION Test 2, Check For Spark During Crank

Using Neon Bulb Spark Tester (D89P-6666-A), check for spark at each right side spark plug wire while cranking. If spark is present and consistent (one spark per crank revolution) on all right side spark plug wires, go to next test. If spark is not present or is inconsistent, go to TEST 5.

RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.