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Home >> Mercury >> 1986 >> Capri Base, 5.0 F >> Repair and Diagnosis >> Engine Performance >> Ignition System >> Ignition System - TFI >> Testing >> Pick-Up Coil & Ignition Module Check >> TFI-I Equipped Engines only

TFI-I Equipped Engines only

  1. Remove distributor from engine and remove ignition module from distributor housing. Inspect distributor ground screw, pick-up coil assembly wires and terminals. Measure pick-up coil resistance with ohmmeter leads connected to points. See Fig 1.
    Fig 1: Pick-Up Coil Assembly Resistance Test Points Pick-up coil resistance should be 650-1300 ohms.
    G744
  2. If resistance was 650-1300 ohms, pick-up coil assembly is okay, replace ignition module. If resistance was less than 650 or greater than 1300 ohms, ignition module is okay, replace pick-up coil assembly. Reinstall ignition module on distributor housing and install distributor on engine.
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