1990 Pontiac LeMans GSE, AutomaticFACTORY OEM SERVICE PROCEDURE

Runs-On Or Diesels

If vehicle continues to run very rough, after ignition is turned to the OFF position, check the following item:

  • Inspect TBI unit with ignition on (engine off) to ensure fuel injectors are not leaking.
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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