1989 Ford Festiva LFACTORY OEM SERVICE PROCEDURE

Ignition Coil Resistance

  1. Inspect coil for signs of arcing or leakage. Remove primary and secondary leads from ignition coil. Using ohmmeter, check primary resistance between (positive) and (negative) terminals of coil. See Fig 1 and Fig 2 .
  2. Check secondary resistance between (positive) terminal and coil tower. See IGNITION COIL RESISTANCEΒ  . Replace coil if readings are not within specifications.
Fig 1: Checking Coil Resistance (Fuel Injection)
G120254Courtesy of MAZDA MOTOR CORP.
Factory Service Tools

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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.