Ignition System

1987 Subaru GL-10 4D Wagon, 1.8 4, AutomaticSECTION Ignition System

The ignition system consists of a distributor containing a crank-angle sensor, an ignition coil equipped with a power transistor, and SPFI control unit. The crank-angle signal and reference signal detected by crank-angle sensor are sent to SPFI control unit.

The SPFI control unit determines optimum ignition timing from these signals and other engine operating parameters, and transmits an ignition signal to ignition coil ignitor. The ignitor amplifies this ignition signal and causes primary current to flow intermittently in ignition coil.

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.