1995 Geo Prizm Base, StandardFACTORY OEM SERVICE PROCEDURE

Electronic Ignition Timing Advance

Ignition timing is controlled by Engine Control Module (ECM)/Powertrain Control Module (PCM). If ignition signal is not present at ECM/PCM, DTC 14 will set in ECM/PCM memory. For testing procedures, see TESTS W/CODES - 1.6L article. For adjusting procedures, see IGNITION TIMING in ADJUSTMENTS - 1.6L article.

Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

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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.

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